A solid has a fixed shape and volume but some solids can change shape when a force is applied.

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

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

To heat something is to increase its temperature.

To melt is to change from a solid state to a liquid state.

Changing state: solid to liquid

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

Introduction to states of matter and changing states

Physical activity and equipment requiring safe use

How can we change the state of a solid to a liquid? 

How should you change the temperature of a solid to change it into a liquid?

The process in which a solid changes to a liquid is called ________. 

How can you change materials from their solid state to their liquid state? 

How could scientists monitor materials changing from their solid state to their liquid state? 

At what temperature does water change from a solid state (ice) to a liquid state? 

Which of the following are in the solid state at room temperature? 

Which of the following is in the liquid state at room temperature? 

In the ________ states, materials have a fixed volume.

In the {{}} state, materials keep their shape, except in some cases when a force is applied to them. 

To heat something is to ________ its temperature.

Which of the following describes what happens to a snowman in the sun? 

Content guidance

Risk assessment required - equipment

Adult supervision required

This lesson will be removed by end of Summer Term 2025.

Changing state: solid to liquid

Lesson outcome

Content guidance

This lesson will be removed by end of Summer Term 2025.