Year 2

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.

Year 2

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.

Lesson details

Key learning points

  1. Reversible vs irreversible changes
  2. Examples of irreversible changes e.g. cooking

Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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4 Questions

Q1.
We learned three main ways to separate mixtures. They were separating by hand, separating by magnetism and __________.
Correct answer: separating by sieving.
separating by weighing.
Q2.
Which method would you use to separate beads of different colours?
Magnetism.
Correct answer: Separating by hand.
Sieving.
Q3.
Which method would you use to separate sand from gravel?
Magnetism.
Separation by hand.
Correct answer: Sieving.
Q4.
Which method would you use to separate small pieces of metal from sand?
Correct answer: Magnetism.
Separation by hand.
Sieving.

3 Questions

Q1.
Freezing is an irreversible change. True or false?
Correct answer: False.
True.
Q2.
Baking a cake is an irreversible change. True or false?
False.
Correct answer: True.
Q3.
Burning is a reversible change. True or false?
Correct answer: False.
True.