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Year 7 Particle Theory
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Year 7 Particle Theory
🔬 Part 1: Check Your Understanding
Choose the best answer for each question.
1. Which statement is part of the particle theory?
Matter is made of tiny particles.
Matter has no space between particles.
Particles never move.
All particles are visible.
2. In which state are particles usually closest together and only vibrate?
Solid
Liquid
Gas
Plasma
3. What happens to particles when a substance is heated?
They stop moving.
They move more slowly.
They move faster.
They disappear.
4. Which observation is evidence that particles are constantly moving?
Perfume spreads through a room.
A rock keeps its shape.
Ice has a fixed shape.
A book is heavy.
✏️ Part 2: Explain Particle Ideas
5. Complete the sentence: Matter is made of tiny ____________.
6. Describe the arrangement and movement of particles in a liquid.
7. Explain why a gas can be compressed more easily than a solid.
8. A metal spoon is placed in hot water. Use particle theory to explain why the spoon becomes warmer.
🎨 Part 3: Draw the Particles
Use dots or small circles to show the particles. Label each drawing.
9. Draw particles in a solid, a liquid and a gas. Show the spaces and movement of the particles.
10. Draw what happens to the particles of an ice cube as it melts. Add arrows to show particle movement.
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