A liquid can flow, has a fixed volume and takes the shape of the bottom its container.

Materials can exist in three common states of matter: solid, liquid and gas.

A gas can flow, has no fixed volume and takes the shape of the whole of its container.

Water is called water vapour when it is in the gas state.

Evaporation is the change of state from a liquid to a gas.

Changing state: liquid to gas

Science

In this Introduction to states of matter and changing states unit, pupils learn that some materials change state when they are heated or cooled. In the Properties, changes and separating materials unit, they will build on this knowledge to learn that dissolving, mixing and changes of state are reversible changes

In the Everyday materials unit, pupils learnt to compare and group together a variety of everyday materials on the basis of their simple physical properties. In this Introduction to states of matter and changing states unit, pupils will build on this knowledge to compare and group materials together according to whether they are solids, liquids or gases

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.

Introduction to states of matter and changing states

Physical activity and equipment requiring safe use

Water in the gas state is called water {{}}. 

Which scientific skill would you be using if you watched water changing state?

What would you need to change to cause a liquid to become a gas?

Which of these statements are true about water vapour? 

What is the name of the process in which a liquid changes to a gas? 

takes the shape of the bottom of its container 

What name is given to the temperature at which a solid changes to a liquid? 

Different materials have __________ melting points.

Materials in the {{}} state are often invisible and have no fixed shape or volume.

Match the process to the action that causes it to happen.

Content guidance

Risk assessment required - equipment

Adult supervision required

Introduction

What will you need for this lesson?

Are you ready to learn?

Equipment

Content guidance

Supervision

Worksheet