The Particle Model of Matter (Grade 7)
Free printable Grade 7 science worksheet on the particle model of matter. Covers particle arrangement in solids, liquids and gases, changes of state, diffusion and expansion.
Grade 7 · Science worksheet
Name
Date
Science
The Particle Model of Matter
Use the particle model to answer each question about solids, liquids and gases.
- 1.A gas can be squashed into a much smaller volume. What does this tell you about its particles?
- 2.Why does a metal bar get slightly longer when it is heated?
- 3.What is the change from a solid straight to a gas called, as dry ice does at room temperature?
- 4.In which state are the particles far apart and moving quickly in all directions?
- a) solid
- b) liquid
- c) gas
- 5.What happens to the movement of particles when a substance is heated?
- 6.In which state are the particles packed closely in a fixed pattern, vibrating on the spot?
- a) solid
- b) liquid
- c) gas
- 7.What is the change from a liquid to a solid called?
- 8.Why does a gas spread out to fill any container it is put in?
- 9.What is the name for particles spreading from where they are crowded to where they are not, like a smell moving across a room?
- 10.At sea level pressure, at what temperature in degrees Celsius does pure water boil?
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