How do cacti, lotus and pine trees survive and thrive in their habitat? Let's find out!

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Created by Vibhor Pandey

Let's explore how clouds are formed through this simple activity!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

What happens if we tie a poly bag around a leaf and leave it overnight? Let's find out!

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How can we prove that air is present all around us? Let's find out!

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What kind of energy do moving objects have? Let's find out!

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What kind of energy does a stretched rubber band, or a compressed spring have? Let's find out!

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How can we check our pulse? Let's find out!

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Let's learn how to measure length and width of objects!

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Let's find out the correct way to measure length of objects!

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Energy can be transformed from one from to another. Let's understand that with a simple activity!

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Let's explore the characteristics of the images formed by a plane mirror!

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What happens if you strike two metal spoons inside water? Do you hear them striking, or not? Let's find out!

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Let's draw a ray diagram to understand the path of light when it reflects off a mirror!

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What are clothes made up of? Let's find out!

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What is energy? How is it related to work? Let's find out!

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Let's look at one method of obtaining fabric from fiber!

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Created by Vibhor Pandey

Activity: https://youtu.be/Hc4kDe-Fptw

Timestamps

Practice this concept - “link to exercise”

Master the concept of “topic name” through practice exercises and videos - Link to topic

Check out more videos and exercises on “unit name” - Link to unit

To get you fully ready for your exam and help you fall in love with “subject” name, find the complete bank of exercises and videos for “class and subject name” here - Link to the course

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.


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Created by

What happens when white light passes through a prism! Something, beautiful! Let's find out!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Activity: https://youtu.be/omAdc2ImbMM

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Have you ever seen an iron nail attract other iron pieces! Well, be prepared!

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Created by Vibhor Pandey

Can a charged object attract neutral objects? Let's find out!

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Created by Vibhor Pandey

Let's draw a ray diagram to identify the path of light when it refracts through a glass slab, and also learn about Snell's law!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Activity: https://youtu.be/nehTPPI1sE0

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Is the magnetic strength of a magnet constant throughout its length or does it vary at the ends? Let's find out!

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What happens when you bring two north poles of a magnet close to each other, and what happens when you bring north and a South Pole close to each other? Let's find out!

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Created by Vibhor Pandey

Some salt can be dissolved in water at a certain temperature of water. But can more or less be dissolved if we change the temperature of water?

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Let's draw a ray diagram to identify the path of light through a prism!

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Some substances are attracted to a magnet and some aren't. Let's look at some examples!

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Created by Vibhor Pandey

Unlocking the Invisible Dance: Exploring the Wonders of Magnetic Field Lines!

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Let's see if the ice cubes in a glass sink or float, when we pour some water into it!

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Let's have a look at a simple electrical circuit in action!

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Let's understand how do converging and diverging beams look like!

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Let's explore the characteristics of the images formed by a concave mirror for objects placed at different positions!

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Created by Vibhor Pandey

How can we purify salt water solution? Let's say we want to obtain pure water form the solution, how do we do that?

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Created by Vibhor Pandey

What happens when you rub twi straws with a cloth and bring them close? Something, very interesting! Let's find out!

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Created by Vibhor Pandey

If we keep a magnetised needle near a current carrying wire, it deflects! But why?

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What happens when we leave a glass of cold water resting on a table for some time? Let's find out!

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Created by Vibhor Pandey

What are the different types of forces? Let's find out!

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Created by Vibhor Pandey

Activity: https://youtu.be/Ii0t3FsrGmc

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

When you freely suspend a magnet, it always point in a fixed direction! What direction is that? Let's find out!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Let's identify which one's a physical change and which one's a chemical change!

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How do we separate the large insoluble solid particles from water?

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Water vapor can change back to its state. What is it called? Let's watch it happen!

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Created by Vibhor Pandey

Some changes happen after a definite period while some can happen at any point in time. Let's look at examples for the same!

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Created by Vibhor Pandey

Light doesn't pass through all materials. Materials can be categorised according to that property!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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There are two types of mixtures. Let's see what are they!

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Created by Vibhor Pandey

How can we separate dissolved salt from water? Let's find out!

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From Light to Shadow: Let's navigate the world of Umbra and Penumbra

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Here's the activity: https://youtu.be/6Nrq1_fWShI

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Some changes can be reversed, while some can't be. Let's look at examples of the same!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Some changes are slow and some are fast. Let's look at some examples for each of them!

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Created by Vibhor Pandey

Some objects and some sink. Objects can be categorised according to that property!

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A force is made up of two things - direction and magnitude. Let's see how!

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Created by Vibhor Pandey

How can we separate two solids from each other?

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Created by Vibhor Pandey

How can we separate water from dissolved salt?

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Created by Vibhor Pandey

Here's the activity: https://youtu.be/XxKDL5RN_eo

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.


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Created by Vibhor Pandey

How does water reach the top of a plant or a tree? Let's find out!

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Created by Vibhor Pandey

Here's the activity: https://youtu.be/Z6vUxC_qmRE

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Let's understand the concept of pressure through a simple activity!

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Created by Vibhor Pandey

How can we separate water and tiny insoluble particles in it?

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Created by Vibhor Pandey

Let's carry out a simple activity and actually see iron rusting!

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How do the wires conduct electricity? Let's find out!

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Rutherford discovered the structure of the atom! Let's understand his model through a simple activity!

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Created by Vibhor Pandey

Heat transferred depends on specific heat as well! Let's understand that through this activity!

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How does heat transfer in solids? Let's find out!

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Created by Vibhor Pandey

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Here's the activity:https://youtu.be/VL1GB4wi7Zs

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor PandeyDescription

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Why do we feel warm when we are near a heat source? Let's find out!

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Created by Vibhor Pandey

Will the level of the water inside the bottle rise if I keep it in boiling water?

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Created by Vibhor Pandey

How does pressure change when different force is applied on the same contact area?

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Created by Vibhor Pandey

The level of water rises when an object is submerged into it. But by how much? Is there any relation between the volume of object and the volume of water displaced?

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Created by Vibhor Pandey

Let's explore the relation between buoyant force and displaced liquid!

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Created by Vibhor Pandey

Why do things feel lighter when they are under water? Let's find out!

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Created by Vibhor Pandey

Why does a ship float and a tiny piece of metal sink? Let's find out!

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Created by Vibhor Pandey

Here's the activity: https://youtu.be/sBlln7G9TPk

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Let's find out if light travels in a straight line through an interesting activity!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Let's see if a magnet behaves the same when a metal plate comes in between!

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Let's see gases expanding in front of our eyes using simple materials!

Here's the explanation:

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Which one's a physical change and which one's a chemical change? We have two cases here, dissolved salt in water and burning magnesium. Let's find out!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Which one's a physical change and which one's a chemical change? We have two cases here, Dissolving sugar and burning sugar. Let's find out!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Created by Vibhor Pandey

Which one's a physical change and which one's a chemical change? We have two cases here, deformation of a solid and spoilage of food. Let's find out!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.


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Created by Vibhor Pandey

Let's look at a cool example of refraction!

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Created by Vibhor Pandey

What produces a sound? Let's understand that through a small activity!

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Let's test if vinegar, oil, water, liquid detergent etc. show any change in the color of a red and blue litmus paper.

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Created by Vibhor Pandey

Which one's a physical change and which one's a chemical change? We have two cases here, heating iron and rusting of iron. Let's find out!

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.

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Let's solve a question on electric field due to a dipole.



Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.


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Let's practice solving board type numerical from Electricity chapter
More free lessons & practice: https://www.khanacademy.org/sc....ience/in-in-class10t
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

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Created by Mahesh Shenoy

Wheatstone bridge is a special circuit consisting of 5 resistors. When the resistances in the adjacent arms have the same ratio, no current flows through the middle resistor! This is called a balanced Wheatstone bridge.
It's used in calculating unknown resistances using a meter-bridge set up.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Created by Mahesh Shenoy

Let's learn the functions & parts of fore, mid & hindbrain.
https://www.khanacademy.org/sc....ience/class-10-biolo

Khan Academy is a nonprofit organization with the mission of providing free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Is there a pattern in how the flowers are arranged in plants? What are the different types of floral arrangements? Watch this video to learn about inflorescence.

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.


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Created by Nivedhitha Suresh

http://www.rootmath.org | Algebra 2

NEXT Video:
Factoring with Polynomial Division:
https://www.youtube.com/watch?v=imJCLnDubuA

How to factor a polynomial of degree 3 with grouping. This method works great for 3rd degree polynomials that can be grouped.

THIS DOES NOT ALWAYS WORK: To learn more about factoring a cubic polynomial continue watching our playlist on factoring or skip to the next video:

http://www.rootmath.org | Algebra

This will be a review of how fractions cancel. Understanding these basic rules now will make everything easier later on in the course when things get more complicated.

http://www.rootmath.org | Algebra

Multiplying fractions is the easiest thing to do with fractions! This will be a quick review of how fractions multiply. We'll use this throughout the algebra course.

http://www.rootmath.org | Algebra

Subtraction is a very poorly behaved operation. It isn't commutative and it isn't associative. But we can force it to be have by turning subtraction into addition!

a - b = a + (-b)

http://www.rootmath.org | Algebra

The associative property tells us that is doesn't matter how we group addition or multiplication. The property can be written like this:

a + (b + c) = (a + b) + c
a(bc) = (ab)c

http://www.rootmath.org | Algebra

In this video we learn the commutative property of addition and multiplication. The commutative property tells us that it doesn't matter which order we add or multiply in. We can right this rule like this:

a + b = b + a
ab = ba


Although this rule is very simple its very important!

http://www.rootmath.org | Algebra

In this video we'll review important sets of numbers:

Natural Numbers
Integers
Rational Numbers
Real Numbers
Complex Numbers

http://www.rootmath.org | Algebra

Welcome to the Algebra course. We'll get started by introducing variables and seeing examples of them in simple equations.

http://www.rootmath.org | Linear Algebra

We prove that the diagonals of a parallelogram are perpendicular if and only if the sides of the parallelogram are the same length.

http://www.rootmath.og | Linear Algebra

The definition of orthogonal: Two vectors are orthogonal when their dot product is zero.

http://www.rootmath.org | Linear Algebra

A brief example of using the dot product definition of the angle between two vectors to find that angle.

http://www.rootmath.org | Linear Algebra

The dot product helps us define the angle between two vectors. In this video we use the law of cosines and the dot product to help us define the angle between two vectors.

http://www.rootmath.org | Linear Algebra

We learn the definition of the dot product and we see an example. In the next video we will see how this definition helps us to define the angle between two vectors.

http://www.rootmath.org | Linear Algebra

We learn some basic properties of vectors like commutativity and associativity of addition, along with others.

http://www.rootmath.org | Linear Algebra

This is a proof that vector addition is commutative and associative. The proof relies on the same properties for the real numbers.

http://www.rootmath.org | Linear Algebra

We derived the length of vectors with 2 and 3 components using the Pythagorean Theorem. Now will will extend the notion of vector length to higher dimensions.

http://www.rootmath.org | Linear Algebra

In this video we'll define R^n. This will hopefully put us on the same page for notation that is coming up in the course.

http://www.rootmath.org | Linear Algebra

In this video we'll derive a formula for finding the length of a 3-dimensional vector. We'll also briefly discuss how to find the length of a vector with more than 3 components.

http://www.rootmath.org | Linear Algebra

We'll look at how to graph vectors with 3 components using 3-dimensional axes.

http://www.rootmath.org | Linear Algebra

u - v = u + (-v)

Since we know how to add vectors and multiply by negative one, we can also subtract vectors. Vector subtraction has geometric significance that we will utilize in a later video.

http://www.rootmath.org | Linear Algebra

When you multiply a vector by a scalar you simply multiply each component by that scalar. Since we can multiply a vector by -1 we can have -v. With this we have the tools we need to talk about vector subtraction (next video)

http://www.rootmath.org | Linear Algebra

Vectors are added by adding corresponding components. Graphically we add vectors with a "head to tail" approach.

http://www.rootmath.org | Linear Algebra

To find the length of a vector we simply use the Pythagorean Theorem. The components of a vector form the base and height of a right triangle. The length of the vector is simply they hypotenuse of that triangle.

http://www.rootmath.org | Calculus 1

Another example of using critical numbers to help us gain a deeper understanding of the relationship between a function and it's derivative

http://www.rootmath.org | Calculus 1

Another example of using critical numbers to examine the relationship between a function and it's derivative

http://www.rootmath.org | Calculus 1

Another example of using critical numbers to help us gain a deeper understanding of the relationship between a function and it's derivative

http://www.rootmath.org | Calculus 1

Another example of using critical numbers to help us gain a deeper understanding of the relationship between a function and it's derivative

http://www.rootmath.org | Calculus 1

We use critical numbers to help us gain a deeper understanding of the relationship between a function and it's derivative

http://www.rootmath.org | Calculus 1

We'll look at the definition of a critical number and how we can find them.

http://www.rootmath.org | Calculus 1

An example that will expand on our understanding of the relationship between extrema and the derivative.

http://www.rootmath.org | Calculus 1

In this video we'll introduce extrema (maximum and minimum points) and analyze them in terms of slope and the derivative

http://www.rootmath.org | Calculus 1

A more difficult problem involving the rate of change of a man's shadow as he walks away from a lamp post.

http://www.rootmath.org | Calculus 1

In this problem we related the rate of the rotation of a security beam to the rate at which the beam moves across the floor.

http://www.rootmath.org | Calculus 1

An introduction to a very interesting problem. I definitely recommend you watch this video before moving on to part 2.

http://www.rootmath.org | Calculus 1

This problem is very similar to filling a pool but with an added consideration. This is a very typical related rates problem for a Calculus 1 class. You may find a problem like this on a test or exam.

http://www.rootmath.org | Calculus 1

This will be a basic related rates problem. We'll try to relate the rate at which water is entering to the pool to the rate at which the water level is rising.

http://www.rootmath.org | Calculus 1

An introduction to related rates and an overview of the example problems to come

http://www.rootmath.org | Calculus 1

We use implicit differentiation to take the derivative of arcsec(x).

http://www.rootmath.org | Calculus 1

We use implicit differentiation to take the derivative of the inverse sine function: arcsin(x).

http://www.rootmath.org | calculus 1

We learn how to take the derivative of the natural log of x.

http://www.rootmath.org | calculus 1

We take the derivative of the equation of a circle.

http://www.rootmath.org | calculus 1

We get a feel for how we might take a derivative implicitly and we get the intuition of why implicit differentiation is really just uses the chain rule.

http://www.rootmath.org | calculus 1

We now learn how the product rule and chain rule can take the place of the quotient rule.

http://www.rootmath.org | calculus 1

We learn the quotient rule

http://www.rootmath.org | Calculus

This is a more advanced example of using the chain rule. In this video we need to use the chain rule twice in a row in order to find the complete derivative. Don't let the title fool you, its not difficult, its just a more advanced example that you should know how to do!

http://www.rootmath.org | Calculus

Our second example of using the chain rule. In this video we will take the derivative of sin(x^2 + 1) using the chain rule. Also remember:

"Derivative of the outside, repeat the inside, times by the derivative of the inside."

http://www.rootmath.org | Calculus

We use the chain rule to take the derivative of e^(2x).

http://www.rootmath.org | calculus 1

Same chain rule, different notation. We'll look at a popular way of viewing the chain rule.

http://www.rootmath.org | calculus 1

We learn the chain rule using function notation. This will be the most important rule we have for taking derivatives.

http://www.rootmath.org | calculus 1

We learn how to take the derivative of a product by using the product rule.

http://www.rootmath.org | Calculus 1

The derivative of all 6 trig functions.

http://www.rootmath.org | calculus 1

We must use the limit definition of the derivative to find the derivative of sin(x)

http://www.rootmath.org | calculus 1

Power Rule- the easiest thing since counting

http://www.rootmath.org | Calculus 1

The derivative of a constant is 0

http://www.rootmath.org | Calculus

This is the third example where will will use the definition to take the derivative of a function. More importantly we will explore the relationship between a function and it's derivative. It is essential that you understand this relationship!

http://www.rootmath.org | Calculus

This is the second example where will will use the definition to take the derivative of a function. More importantly we will explore the relationship between a function and it's derivative. It is essential that you understand this relationship!

http://www.rootmath.org | Calculus

This is the first example where will will use the definition to take the derivative of a function. More importantly we will explore the relationship between a function and it's derivative. It is essential that you understand this relationship!

http://www.rootmath.org | Calculus

Our third and final example of finding the slope of a tangent line by using the definition of the derivative.

http://www.rootmath.org | Calculus

We look at the square root of x and find the slope of the tangent line when x is one. This is another example of finding the slope of a tangent line using the definition of the derivative.

We will find the slope of the tangent line by using the definition of the derivative.

http://www.rootmath.org | Calculus

In this video we discover the derivative by attempting to find the slope of a tangent line. We'll see that the derivative is just a limit involving slope.

http://www.rootmath.org
http://www.rootmath.org/calculus/problem-solving

Solving a problem involving a circle, secant lines and tangent lines. This problem will lead directly to learning the definition of a derivative.

http://www.rootmath.org
http://www.rootmath.org/calculus/problem-solving

Solving an interesting limit problem involving radicals

http://www.rootmath.org | calculus 1

A look at the geometry of a limit we looked at previously.

http://www.rootmath.org | Calculus 1

Examining the geometry of the trig functions sec(x) and tan(x)

I mention that I couldn't find information. I do not mean to imply that the information isn't out there (it certainly is), I just couldn't find it after doing some brief searches so I decided to just toy with these ideas on my own. I hope this encourages you to do the same!

http://www.rootmath.org
http://www.rootmath.org/calculus/trig-limits

Proof of the lim(sinx/x) = 1

http://www.rootmath.org
http://www.rootmath.org/calculus/continuity-and-one-sided-limits

An example of forcing a piece-wise function to be continuous.

http://www.rootmath.org
http://www.rootmath.org/calculus/continuity-and-one-sided-limits

Continuity is a requirement for many theorems, we'll look at how it is defined.

http://www.rootmath.org
http://www.rootmath.org/calculus/continuity-and-one-sided-limits

An example to test our understanding of one sided limits.

http://www.rootmath.org
http://www.rootmath.org/calculus/continuity-and-one-sided-limits

A quick explanation of one sided limits

http://www.rootmath.org
http://www.rootmath.org/calculus/epsilon-delta-limit-definition

This is an advanced example of proving a limit using the epsilon-delta definition.

http://www.rootmath.org
http://www.rootmath.org/calculus/epsilon-delta-limit-definition

An example of using the definition of a limit to prove the limit.

http://www.rootmath.org
http://www.rootmath.org/calculus/epsilon-delta-limit-definition

An understanding of the Epsilon Delta definition of a limit.

http://www.rootmath.org
http://www.rootmath.org/calculus/epsilon-delta-limit-definition

A look at intervals and notation involved in the Epsilon Delta definition of a limit.

http://www.rootmath.org
http://www.rootmath.org/calculus/trig-limits

Solving two limits of trig functions.

http://www.rootmath.org
http://www.rootmath.org/calculus/trig-limits

Often times a few special trig limits are proven in class. We'll look at one that we'll prove later, and one that we can prove now.

http://www.rootmath.org
http://www.rootmath.org/calculus/solving-limits

Solving limits involving complicated fractions. Please see the lesson page for practice exercises: http://www.rootmath.org/calculus/solving-limits

http://www.rootmath.org
http://www.rootmath.org/calculus/solving-limits

Rationalization (getting rid of square roots), a new technique for solving limits. Please visit the lesson page for practice exercises: http://www.rootmath.org/calculus/solving-limits


Square Roots: Positive or Negative?
http://forum.rootmath.org/viewtopic.php?f=5&t=22

http://www.rootmath.org
http://www.rootmath.org/calculus/solving-limits

Factoring, a new technique for solving limits analytically. Please visit the lesson page for practice exercises: http://www.rootmath.org/calculus/solving-limits

http;//www.rootmath.org
http://www.rootmath.org/calculus/properties-of-limits

We'll learn properties of limits (what we can and can't do with limits). We'll start to take these for granted in future videos when we solve limits.

http://www.rootmath.org
http://www.rootmath.org/calculus/limits-that-fail-to-exist

Our third example of a limit that does not exist. This limit does not exist because the function oscillates as x approaches 0 and so the limit does not exist.

http://www.rootmath.org
http://www.rootmath.org/calculus/limits-that-fail-to-exist

A limit does not exist when it 'grows without bound.' Intuitively, if a function keeps getting bigger as you approach the limit value then the limit does not exist.

http://www.rootmath.org
http://www.rootmath.org/calculus/limits-that-fail-to-exist

Some limits don't exist. The absolute value of x over x, |x|/x, has no limit as x approaches 0. This is because there is a jump in the graph at zero, or a jump discontinuity. This causes the value of the function to differ at the two sides of the jump and so the limit fails to exist.

http://www.rootmath.org
http://www.rootmath.org/calculus/estimating-limits-numerically

Introduction to the limit of a function. We cover how to find a limit by estimating it numerically and we explain why limits are useful. This technique will be made more precise in later videos where we find that our estimate and the exact value are the same.

http://www.rootmath.org
http://www.rootmath.org/calculus/intro-to-limits

An introduction to limits. We'll explore the concept of a limit in basic terms.

http://www.rootmath.org | Calculus 1

An overview of the Calculus Course to come.

http://www.rootmath.org | Algebra

This is the second example of finding a least common denominator by first finding a Least Common Multiple. This technique is useful for 'small' or 'easy' numbers.

http://www.rootmath.org | Algebra

In this video we find a least common denominator by first finding a Least Common Multiple. This technique is useful for 'small' or 'easy' numbers.

http://www.rootmath.org | Algebra

An introduction to adding fractions. We'll look at the easy case of adding fractions with a common denominator and we'll also see why we can't add fractions with different denominators.

http://www.rootmath.org | Algebra

In this video we learn that certain fractions are equal to 1. This will be very useful later when we want to find common denominators.

http://www.rootmath.org | Algebra

In this video we learn how to multiply fractions. Multiplying fractions is the easiest thing you can do with fractions so it's the first thing we'll learn.

http://www.rootmath.org | Algebra

In this video we get a basic understanding of fractions. We learn what a numerator and denominator is and what pieces of information they tell us.

This lesson walks through 12 climate types of the world. Organized into 9 climates classified by latitude and 3 climate types that can be found at any latitude, Mr. Rueschhoff explains each climate, where they are found, the climate factors that contribute to their creation, and their associated biome.

Climates discussed are Tropical Wet; Tropical Wet/Dry; Humid Subtropical; Humid Continental; Mediterranean; Marine West Coast; Sub-Arctic; Tundra; Icecap; Arid, Semi-Arid; and the Highland Climates.

Together with the previous lesson on the Five Factors of Climates and Biomes, viewers should be able to up their finger on the globe and have a good idea of what it is like there in terms of climate.

While accessible to anyone, this lesson is specifically written to address the educational standards of the Texas Education Knowledge Standards for the World Geography studies course.

The lesson builds upon our look at latitude's impact on seasons and adds four more factors to explain how the Earth's climate is created. In addition to Latitude--the most important factor--are Elevation, Wind Currents, Ocean Currents, and Topography.

The lesson reviews how latitude greatly influences temperature on Earth and introduces how Elevation also has an impact on temperature of regions on Earth. Next, the lesson introduces Wind and Ocean Currents. It explains how convection drives our winds and creates the Hadley Cell and Inter-tropical Convergence Zone (ITCZ) that has a profound impact of climate in the tropics and creates the conditions for some the world's largest deserts.

Influenced by these Wind Currents are the Ocean Currents which are in a constant cycle of warm and cold water exchange between the equator and poles. Why the waters off of the west coast of a continent are usually cool while waters off the east coast are warm are explained. (Hint, it has to do with the Coriolis Effect). The role that El Nino and the North Atlantic Drift have in shaping the climate of the Americas and Europe are discussed as is the impact of Continentality.

The lesson concludes by discussing Topography's role in our climate--chiefly due to the Rainshadow Effect.

While useful to all audiences, this lesson is specifically designed to address elements of the Texas Education Knowledge Standards for the World Geography Studies Course.

This video lesson explains why we have seasons on Earth. Specifically, it examines the Earth-Sun relationship. Viewers will learn it isn't just that the Earth rotates every 24 hours or even that it revolves around the Sun ever 365.25 days. Rather, what is special is that the Earth is titled that means that the Sun's energy (solar insolation) is distributed unevenly on the Earth's surface.

The big takeaway--beyond the fact that the Earth's seasons are caused by the Earth's revolution and tilt--is that latitude is an extremely important factor in determining what makes up the characteristics of a location.

Mr. Rueschhoff uses models to show the stages of this Earth-Sun relationship throughout the year to explain what Solstices and Equinoxes are. He concludes by breaking latitude into three bands (High, Middle, and Low) and explain how these three latitude bands have uniquely different seasons--it's not just Spring, Summer, Fall, and Winter!

A lesson that can be viewed and appreciated by all, but is specifically designed to address standards in the Texas Education Knowledge Standards (TEKS) for the World Geography studies course.

This video lesson looks at external factors that shape the Earth's landforms: weathering, erosion, and deposition. This examination of physical geography and geology aspects of the world includes looking at the differences between chemical and physical (or mechanical) weathering, how rain, wind, ice (glaciers), and even gravity moves sediment, and then how deposition of sediment creates landforms such as river deltas as well as produces fertile areas such as the North European Plain through the deposition of loess.

In addition, a review of what soil is and how it is created is included as well as how these processes create sedimentary rock.

This lesson is designed to not only inform all audiences, but also to focus on the Texas Education Knowledge Standards for the World Geography studies course.

CORRECTION: AT 8:58, I stated that if there is just one Continental Plate you would have Convergent Subduction. I meant to say OCEANIC Plate. Sorry.

Ever heard someone say you're "making a mountain out of a molehill?" Well, I don't actually know what a molehill is (actually, I think I do), but in this lesson, we will examine the Earth's forces that creates its mountains--namely Continental Drift and Plate Tectonics.

This lesson begins by looking at the composition of the Earth and discover that its core, mantle, and crust make it much more like a baseball, than a blue marble that some have called it.

We then look at the outside of the Earth and find that it also has stitches, just like a baseball. Here we learn of Alfred Wegner's examination of the Earth which used records of fossils and rock formations to assert that the continents move--giving rise to the theory of Continental Drift.

While the geology community thought that Wegner was crazy, Harry Hess joined the Navy and through the use of sonar mapped the ocean floor and with carbon dating of the ocean crust, discovered Wegner was right and explained how the continents move through a process not unlike a lava lamp (interested, gotta watch the video--hint, it's through convection of the magma in the asthenosphere).

The lesson then looks at the three major ways that tectonic plates will move in relation to each other: divergence, convergence, and transform boundaries and discover that these moving plates create landforms such as mountains and volcanoes--and even rift valleys.

Because of the different densities, the lesson points out that if there is an oceanic crust involved in a collision of tectonic plates, it will cause something called Convergent Subduction which creates the subduction zone of the Ring of Fire. And if there are two continental plates, it creates Convergent Folding which is the process that continues to create the Himalaya Mountains and Mt. Everest.

All of the movement of these plates, creates a great deal of stress on the crust creates cracks, called faults which is where Earthquakes occur. And the lesson examines how tsunamis are created through underwater earthquakes.

Last, the lesson concludes discussing the Hot Spots that have created the Hawaii Islands as well has turned Yellowstone into a Supervolcano.

This lesson is designed for anyone, but is focused on meeting the Texas Education Knowledge Standards for the World Geography studies course in the State of Texas.

This lesson walks students through the basic landforms on the Earth. This includes plains, mountains, hills, plateaus, peninsulas, islands, archipelagos, valleys, and canyons. The importance of rivers and the deltas and alluvial plains they create are examined.

The lesson also discusses the difference between oceans, seas, gulfs, and bays. The importance of straits are discussed and how they are the mirror opposite of isthmuses. The difference between lakes and reservoirs--despite usually all called lakes--is pointed out.

Beyond discussing the definitions, as fluid as they might be, the lesson discusses the ways that many of these landforms have been created. This includes the weathering, erosion, and deposition of sediment by wind, water, ice (glaciers), and even gravity. The role that plate tectonics in oceanic and continental plate convergence--either convergent subduction or convergent folding--has in creating landforms such as mountains is shown.

While this lesson can be enjoyed by all audiences, it is designed to meet various standards of the Texas Education Knowledge Standards (TEKS) for the World Geography studies course.

This lesson introduces the viewer to the Four Earth Systems: Atmosphere, Lithosphere, Hydrosphere, and Biosphere.

The lesson explains how each system is made up of sub-components and how each system interacts with the other three systems--all supporting life on Earth.

The Carbon Cycle and Water Cycle are described and the Life Cycle is introduced.

This lesson is designed to satisfy elements of the Texas Education Knowledge Standards for the World Geography studies course.

This lesson looks at the way that countries seek to influence each other. In other words, how countries use power.

Calling upon Mr. Rueschhoff's over 23 years of military service his Master's Degree in Military Studies, he describes the Sources of National Power and the Instruments of National Power. These are concepts used by strategic planners in capitals around the globe.

First, the term power is defined and the concept of the Balance of Power is introduced and its role in keeping world peace.

Then, the lesson looks at what makes a nation powerful through the Sources of National Power which are its physical geography, economics, people, national will, and national direction.

But being powerful isn't enough, it is about how you use this power and Mr. Rueschhoff explains that countries use the DIME: Diplomacy, Information, Military, and Economics. These are the Instruments of National Power. Countries will use a blend of these four instruments to avoid war, gain territory, increase trade, resolve conflicts, and form alliances.

The organizations and alliances that are discussed are the United Nations, European Union, NATO, and OPEC.

While useful to all audiences, this lesson is specifically made to address standards of the World Geography studies course in the Texas Education Knowledge Standards (TEKS).

This is part 2 of our Agriculture and Economies lesson. In part 1, we went over the agricultural and industrial revolutions that made our economies possible.

In this lesson, we go over the 4 Economic Activities (Primary, Secondary, Tertiary, and Quaternary) and the types of Natural Resources. Then, we go over the types of economic systems. We meet Adam Smith and Karl Marx and discuss Free Market, Command (Socialism & Communism), and Mixed Economies. We also briefly discuss Mercantilism and we describe traditional economies.

While all audiences can benefit from this lesson, it is specifically written for a World Geography studies course satisfying multiple standards within the Texas Education Knowledge Standards (TEKS).

This is part one of a two-part lesson that outlines how the agricultural and industrial revolution have shaped our world and our economic systems.

This lesson focuses on the Neolithic Revolution when mankind first discovered agriculture, the Enclosure Movement that spurred the 2nd Agricultural Revolution and the Industrial Revolution, and the Green Revolution.

Useful for all audiences, this lesson was specially designed to be used in Texas classrooms and addresses standards found in the World Geography studies and World History TEKS when it discusses the differences between Subsistence and Commercial Agriculture and the effects of the Industrial Revolution.

This video lesson builds on the discussion about developing and developed countries in the Population Geography lesson. In this lesson, Mr. Rueschhoff describes the United Nation's Human Development Index, how it is determined, and how it can be used to describe countries of the world.

Each of the HDI's dimensions is discussed: Long, Healthy Living, Knowledge, and Standard of Living. This includes explaining the difference between Gross National Income, Gross National Product, and Gross Domestic Product.

Mean and Expected Schooling is discussed as are literacy rates when discussing the knowledge dimension of the UN's HDI.

The lesson concludes with Mr. Rueschhoff showing the population pyramids of a developed country, developing country, and a newly industrialized country and how these relate to the UN's HDI categories.

Thumbnail photograph was used under a Creative Commons license from NigerTZai (BY-SA 4.0).

This lesson introduces the basics of population geography including population demography and population pyramids. Push and Pull factors of migration are also examined.

Specifically, birth rate, fertility rate, mortality rate, and infant mortality rates are defined and different types of population pyramids are examined with how they can help show the developmental status of different countries.

This lesson is provided to satisfy selected standards in the Texas Education Knowledge Standards for the World Geography studies course.

This lesson explores culture: defining what culture is, what are its basic elements, and how it shapes our world today.

Concepts such as ethnocentrism, ethnicity, cultural hearths, cultural diffusion, cultural divergence, cultural convergence, acculturation, and enculturation are explained for the viewers. In addition, the role that technology and innovation have in making culture dynamic is discussed.

As culture is not only dynamic, but also symbolic, language as a mirror of culture is examined. Aspects of language are defined such as language families, dialects, and how lingua francas are used in the world.

While applicable to anyone who is wishing to better understand what culture is and what it entails, this lesson is provided to specifically address elements of the Texas Education Knowledge Standards of the World Geography studies course.

😍😍😍

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

This is part of the IB's NEW physics syllabus, which means you have exams in May 2025 or later.
*If you have exams in May 2024 or Nov 2024, then you should look at the videos I have for that - see the OLD syllabus section at: https://www.youtube.com/@OSC1990

Let's explore the translocation through phloem
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Let's learn how transpiration helps water transport in xylem
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Let's explore xylem and phloem (transport in plants)
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Let's explore respiration sites and what ATPs are.
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Lets explore cellular respiration (Aerobic & anaerobic)
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Let's explore the photosynthesis process.
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Let's explore Autotrophs, holozoic, saprotrophs & parasites
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

Let's explore the various life processes that keep us alive.
More free lessons & practice -https://www.khanacademy.org/sc....ience/in-in-class9th

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!

Created by Mahesh Shenoy

How is the juicy fruit in mangoes and grapes formed? How are the seeds, which can grow into a new plant, formed? This video answers these questions.

Khan Academy is a free learning platform for Class 1-12 students with videos, exercises, and tests for maths, science, and more subjects. Our content is aligned to CBSE syllabus and available in Hindi, English, and many more regional languages.


Experience the joy of easy, seamless, accessible learning anywhere, anytime with Khan Academy.


Subscribe to our YouTube channel - https://www.youtube.com/c/khanacademy

As a 501(c)(3) nonprofit organization, we would love your help!
Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc

Created by Nivedhitha Suresh

This is Animation video on Phototropism and Geotropism

The ability to accurately observe, dissect and record an organism is a key skill for biology students. Many students are intimidated by the idea of making a scientific drawing, and struggle to develop their skills in this area.

This video will guide you through how to complete a dissection and scientific drawing of a flower. We recommend using Alstroemeria, as they are regularly available in supermarkets. However, there is an alternative version in which students follow in the footsteps of Darwin, making careful observations and dissections of primulas. Primulas are available in garden centres through much of the late autumn, winter and spring months, and flower in the garden in spring.

0:00 Credits
0:17 Step 1 - remove sepals
0:45 Step 2 - remove petals
1:11 Step 3 - remove stamens opposite sepals
1:54 Step 4 - remove stamens opposite petals
2:21 Step 5 - bissect the ovary
2:58 Step 6 - identify the line of symmetry in the flower
3:16 Step 7 - slice along the line of symmetry
3:32 Step 8 - continue slicing through the petals
4:00 Step 9 - arrange the parts for drawing
4:21 Step 10 - observe the flower parts
4:55 Step 11 - produce anatomical flower drawing

Follow our channel for biology practicals and more.
Teaching and technical notes plus student sheets: https://www.saps.org.uk/dissection
#saps #alevelbiology #flowers

Watching gas bubble up from a pondweed as it photosynthesises can be a great demonstration or student practical. When placed closer to a light , the rate of bubbling will speed up, and as the pondweed is taken further away, the bubbles will slow down again – an instant and visual indicator of the importance of light in photosynthesis.

This video demonstrates how best to use this protocol with your students in the lab, which species of pondweed can be used, how to care for pondweeds and a short explanation on the physiology that allows pondweed to bubble.

A great lab practical for investigating photosynthesis and respiration at GCSE and A-level / post-16. The bubbles produced by pondweed can be counted and the rate of bubbling can serve as an indication of the rate of photosynthesis, or the gas can be collected in a pipette or microsyringe and the amount measured. Students can investigate the effects of either light intensity or the wavelength (colour) of light on photosynthesis.

0:00 Introduction
0:59 Different types of pondweed
3:35 Keeping pondweed healthy
5:37 Setting up the bubbling pondweed practical
10:04 Why does pondweed bubble?
12:03 Summary

Full teaching notes are available at https://www.saps.org.uk/pondweed
#scienceexperiment #photosynthesis #plantscience #saps

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

This is part of the IB's NEW Biology syllabus, which means you have exams in May 2025 or later. The videos were designed and recorded by Cheryl Hickman

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch

Are you preparing for your IB maths exams? We've got you covered! OSC Study features exams created by IB experts in mathematics, showing you every step of every solution. Try it out for free here: https://app.oscstudy.com/

We're so excited to be able to share our exams with you!

Cheers, Mitch