Year 7 Science · Unit 2 · Lesson 10

Chemical vs Physical Change

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Odd one out

Circle the item that does not belong in each group. Then explain why it doesn't fit — think about whether a new substance is formed.

#GroupYour answer (odd one + reason)
1 Melting ice    Boiling water    Dissolving sugar    Burning wood
2 Rusting iron    Cooking an egg    Breaking glass    Burning magnesium
3 Cutting paper    Bending metal    Tearing fabric    Bread turning brown in a toaster

Your Turn

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

If a change is reversible, it must be a physical change.

Correct it:

T
F

Burning wood is a physical change because ash is still made of carbon atoms.

Correct it:

T
F

Dissolving salt in water is a physical change because you can recover the salt by evaporating the water.

Correct it:

T
F

In a chemical change, the particles rearrange into the same types they were before, just in different positions.

Correct it:

T
F

Show What You Know

1. A student says: "Breaking glass must be a chemical change because you can't put it back together." Is the student correct? Explain your answer using the correct scientific test for chemical change.

Recall 2 marks

2. At the particle level, what is the key difference between a physical change and a chemical change?

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 7 Science · Unit 2 · Lesson 10 · Foundation Worksheet