1. Topic – Particle model of matter
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PiXL GetIT!
GCSE Physics
Topic – Particle model of matter   
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2. The arrows show the direction in change of state.
GetIT – Particle model of matter
Particles cannot be squashed, but the gaps between them can change.
Density is determined by the mass of the atoms and how closely they are packed together.
The state of matter tells you if it is solid, liquid or gas. Matter can change state.
The arrows show the direction in change of state.

3. Match IT Density Solid Liquid Gas Evaporating Condensing
Change in state from liquid to gas when the temperature is lower than the boiling point
Solid
Energy required to raise temperature of 1Kg of substance by 1oC
Liquid
Change in state from a liquid to a gas at a specific temperature
Gas
Energy required to change the state of 1Kg of substance without a change in temperature
Evaporating
Amount of substance per unit volume.
Mass ÷ Volume
Condensing
No fixed size or shape; can be compressed
Specific Heat Capacity
Change in state from gas to liquid
Specific Latent Heat
Fixed size but not shape; particles close together and attract each other
Boiling
Fixed size and shape; particles vibrate but cannot change position

4. Match IT - Answers Density Solid Liquid Gas Evaporating Condensing
Amount of substance per unit volume.
Mass ÷ Volume
Solid
Fixed size and shape; particles vibrate but cannot change position
Liquid
Fixed size but not shape; particles close together and attract each other
Gas
No fixed size or shape; can be compressed
Evaporating
Change in state from liquid to gas when the temperature is lower than the boiling point
Condensing
Change in state from gas to liquid
Specific Heat Capacity
Energy required to raise temperature of 1Kg of substance by 1oC
Specific Latent Heat
Energy required to change the state of 1Kg of substance without a change in temperature
Boiling
Change in state from a liquid to a gas at a specific temperature

5. Label IT
Label the diagram. This is a temperature-time graph for melting ice.
Add diagrams to show how the particles would be arranged at each stage.

6. Label IT - Answers

7. Label IT - Answers
Solid
Fixed size and shape; particles vibrate but cannot change position
Liquid
Fixed size but not shape; particles close together and attract each other
Gas
No fixed size or shape; can be compressed
Boiling
Change in state from a liquid to a gas at a specific temperature
Melting
Change in state from a solid to a liquid