Good Science Victorian Curriculum Year 7

CHAPTER 4: STATES OF MATTER
FINAL CHALLENGE
1 Define matter in your own words.
2 Copy and complete this sentence: The heat energy that particles possess, the
faster they move. If you remove heat energy from the particles, they will .
3 Liquids can become gases in two ways. What are they?
Level 1
50xp
4 Match these terms to their definitions.
freeze
melt
evaporate
condense
melting point
5 Label each of these
diagrams as ‘solid’,
‘liquid’ or ‘gas’.
To heat a solid until it becomes liquid
To heat a liquid until it becomes a gas
To cool a liquid until it becomes a solid
How hot something has to get before it melts
To cool a gas until it becomes a liquid
Level 2
100xp
6 Explain the difference between the particles in a liquid and the particles in a gas.
7 Are particles in a solid always moving? Justify your answer.
8 Describe the effect of adding heat to a:
a solid b liquid c gas.
Level 3
150xp
9 Draw a diagram that shows the behaviour of particles that are heating, and another that
shows the behaviour of particles that are cooling.
Level 4
10 Explain how and why condensation happens.
11 Explain what the particle model is and suggest why it is referred to as a model.
200xp
12 You can calculate density by dividing an object’s mass by its volume. Explain why mass
and volume are used to calculate density.
13 Using an explanation involving the particle model, suggest why the bridge in Figure 4.9
is designed with this metal feature.
Level 5
300xp
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