Form/Class
Particles
Answer as many parts of each question as you can. Write your answer on a separate sheet.1 / Everything is made up from tiny pieces of matter called particles. Matter can take the form of different states: solids, liquids or gases.
1a / What is the state of matter of each of these materials?
(i)air
(ii)brick
(iii)water / [3]
1b / Describe, with the help of a diagram, how particles are arranged in water. / [3]
1c / Explain what happens to the particles in water when it is boiled. / [3]
1d / Use ParticleTheory to describe what happens in evaporation. / [3]
2 / Everything is made up from tiny particles, which can be atoms or molecules. Each atom is itself made up from even smaller particles.
2a / Name the three types of particles that make up an atom. / [3]
2b / A scientist carries out some tests on a substance and finds that it:
- has a fixed volume
- is difficult to compress
- does not flow.
2c / Explain what happens to the particles in an ice cube as it melts, using your knowledge of Particle Theory. / [3]
2d / Describe a model you could use to demonstrate how particles move in a liquid. / [3]
3 / The word ‘fluid’ is used to describe substances that can flow. Liquids and gases are different types of fluids.
3a / State which of the following substances are liquids:
- water
- steam
- honey
- ice
- oxygen
3b / Describe the main features of a liquid. / [3]
3c / Explain what happens when a liquid freezes, using Particle Theory. / [3]
3d / The air all around us causes atmospheric pressure. Explain how this happens. / [4]
3e / When camping, explain why it would take longer to boil an egg on the top of a Mountain like Snowdon than at the Seaside like Poole. / [3]