Year 4 - Science
Properties of solids, liquids and gases
Introduction to states of matter and changing states
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores the properties of solids, liquids, and gases, and how materials change state when heated or cooled. It covers evaporation, condensation, and the water cycle, with a focus on practical enquiries, careful observations, accurate measurements, and presenting findings.
Lesson Summary
You will learn to describe simple properties of solids, liquids and gases.
Key Notes
- Substances can exist as different states of matter: solid, liquid and gas.
- Solids, liquids and gases have different properties.
- A solid has a fixed shape and volume but some solids can change shape when a force is applied.
- Liquids can be poured easily and take the shape of the bottom of the container that they are in.
- Gases are often invisible. They escape from an unsealed container and have no fixed shape or volume.
Vocabulary To Learn
- states of matter: The three common states of matter are solid, liquid and gas.
- solid: A solid has a fixed shape and volume but some solids can change shape when a force is applied.
- liquid: A liquid can flow, has a fixed volume and takes the shape of the bottom of its container.
- gas: A gas can flow, has no fixed volume and takes the shape of the whole of its container.
- properties: The properties of a material or substance are its qualities or things it can do.
Common Mistakes To Avoid
- A material can only exist as a solid, liquid or gas, rather than having different forms at different temperatures. Gases have no mass or volume.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Substances can exist as different states of matter: solid, liquid and gas. Solids, liquids and gases have different properties.
2. Define this scientific word and use it in context. 'states of matter'
The three common states of matter are solid, liquid and gas. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: A material can only exist as a solid, liquid or gas, rather than having different forms at different temperatures. Gases have no mass or volume. Correction: Teaching slides explain that most materials can exist in different states and that gases have a mass and volume. Investigations help children explore the properties of materials in different states.
More Lessons In This Unit
- Changing state: gas to liquid Study Guide
- Changing state: liquid to gas Study Guide
- Changing state: liquid to solid Study Guide
- Changing state: solid to liquid Study Guide
- Comparing and grouping solids, liquids and gases Study Guide
- Evaporation and condensation in the water cycle Study Guide
- Everyday examples of changing state: solids and liquids (non-statutory) Study Guide
- Everyday examples of evaporation and condensation (non-statutory) Study Guide
- Melting ice caps and glaciers (non statutory - Climate Change & Sustainability) Study Guide
- Melting temperatures: do and review Study Guide
- Melting temperatures: plan Study Guide
- Melting temperatures: research Study Guide
- Temperature and evaporation: do and review Study Guide
- Temperature and evaporation: plan Study Guide
- Thermometers and data loggers Study Guide
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