What are changes of state and why do they take place?

In this lesson, we will learn about what happens when substances are heated or cooled enough to change state. We will learn about the four main state changes and identify examples of each of them.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.When you heat a substance the particles...

1/5

Q2.When you cool a substance the particles...

2/5

Q3.When a substance is cooled it...

3/5

Q4.When a substance is heated it...

4/5

Q5.What happens to the particles in a solid when it is cooled?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.When you heat a substance the particles...

1/5

Q2.When you cool a substance the particles...

2/5

Q3.When a substance is cooled it...

3/5

Q4.When a substance is heated it...

4/5

Q5.What happens to the particles in a solid when it is cooled?

5/5

Video

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Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

What are changes of state and why do they take place?

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which change of state occurs when a solid becomes a liquid?

1/5

Q2.Which state changes occurs when a gas becomes a liquid?

2/5

Q3.When a solid is cooled the particles...

3/5

Q4.When a liquid boils the particles...

4/5

Q5.When gases condense the particles...

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

What are changes of state and why do they take place?

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which change of state occurs when a solid becomes a liquid?

1/5

Q2.Which state changes occurs when a gas becomes a liquid?

2/5

Q3.When a solid is cooled the particles...

3/5

Q4.When a liquid boils the particles...

4/5

Q5.When gases condense the particles...

5/5

Lesson summary: What are changes of state and why do they take place?

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