Study Hub

Study Guides

This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.

Back to Study HubBrowse Year 10 Science Guides

Year 10 - Science

The particle model

States of matter

Unit Summary

This unit covers the particle model, states of matter, and changes between them, distinguishing physical from chemical changes. It explains the concept of purity in scientific terms, using melting point data to identify pure and impure substances, and explores the limitations of the particle model.

Lesson Summary

You will learn to describe the particle model of matter and how it explains the properties of solids, liquids, and gases.

Key Notes

  • There are three states of matter: solid state, liquid state, and gas state.
  • A substance in the gas state can be compressed because there is empty space between the particles.
  • A substance in the liquid or solid state cannot be compressed because the particles are already touching.
  • A substance in the gas or liquid state has no fixed shape as the particles can move past each other.
  • A substance in the solid state will not flow because the particles vibrate in a fixed position.

Vocabulary To Learn

  • states of matter: The states of matter are used to describe the three physical states that matter commonly exists in: the solid state, liquid state and the gas state.
  • particle model: The particle model is a model used to explain the physical properties of substances by describing the arrangement and movement of particles.
  • forces of attraction: Forces of attraction are pulling forces that keep particles close together.
  • compress: If you compress a substance, it can be made to take up less space than before. Substances in the gas state can be compressed.

Common Mistakes To Avoid

  • Pupils often think that the particles are embedded in the substance rather than being the substance. Most pupils think that substances in the liquid state will compress a little.

3 Quick Questions (With Answers)

1. Explain the scientific idea in this lesson using two key points.

There are three states of matter: solid state, liquid state, and gas state. A substance in the gas state can be compressed because there is empty space between the particles.

2. Define this scientific word and use it in context. 'states of matter'

The states of matter are used to describe the three physical states that matter commonly exists in: the solid state, liquid state and the gas state. Include the word in a full scientific explanation, not as a single label.

3. Correct this common scientific misunderstanding.

Mistake: Pupils often think that the particles are embedded in the substance rather than being the substance. Most pupils think that substances in the liquid state will compress a little. Correction: Reinforce that most substances can exist in all three states of matter and when they are in the gas state there is nothing between the particles but empty space.

More Lessons In This Unit

Browse all guides in the Year 10 Science guide library.