Science

Exit Lesson

Are there some changes we can't reverse?

In this lesson, we will be learning about reversible and irreversible changes. We will look at some examples of changes that can be reversed, which are called reversible changes, before moving on to looking at some examples of changes that cannot be reversed, which are called irreversible changes.

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.We learned three main ways to separate mixtures. They were separating by hand, separating by magnetism and __________.

1/4

Q2.Which method would you use to separate beads of different colours?

2/4

Q3.Which method would you use to separate sand from gravel?

3/4

Q4.Which method would you use to separate small pieces of metal from sand?

4/4

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.We learned three main ways to separate mixtures. They were separating by hand, separating by magnetism and __________.

1/4

Q2.Which method would you use to separate beads of different colours?

2/4

Q3.Which method would you use to separate sand from gravel?

3/4

Q4.Which method would you use to separate small pieces of metal from sand?

4/4

Video

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Worksheet

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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:

Are there some changes we can’t reverse?

Well done everyone on some great learning! Now have a go at answering these questions to see how much you can remember from the lesson.

Q1.Freezing is an irreversible change. True or false?

1/3

Q2.Baking a cake is an irreversible change. True or false?

2/3

Q3.Burning is a reversible change. True or false?

3/3

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:

Are there some changes we can’t reverse?

Well done everyone on some great learning! Now have a go at answering these questions to see how much you can remember from the lesson.

Q1.Freezing is an irreversible change. True or false?

1/3

Q2.Baking a cake is an irreversible change. True or false?

2/3

Q3.Burning is a reversible change. True or false?

3/3

Lesson summary: Are there some changes we can't reverse?

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Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Dance

This was the final lesson in the unit Mixing and making.

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