Everything around us exists as one of the states of matter; solid, liquid and gas. Matter can change its state when it is heated or cooled.
When water is frozen into ice, it becomes a solid. At room temperature it is a liquid. When you boil a kettle, you can see water vapour escape as a gas.
Teach your children about the States of Matter using our handy topic guide!
- This lesson plan is a good introductory lesson for a primary class.
- Demonstrate changing states of matter by melting and cooling some delicious chocolate.
- Observe how water evaporates from a puddle to investigate evaporation.
- Make a model of the water cycle in a plastic bag!
- Create a voice-over for these videos of gases in everyday life from the BBC.
- Investigate non-Newtonian fluids with cornflower and water in this simple activity.
- Explore what happens when gases are compressed with this experiment.
Solids, Liquids and Gases Facts
- Matter is everything around us. It is the “stuff” the world is made of.
- There are three main states of matter; solids, liquids and gases.
- Solids have a fixed shape.
- Liquids can flow and take the shape of the container they are in.
- Gases spread out in space.
States of Matter – Experiments
This video shows two simple experiments that children could try.
Running time: 3:41
What is a Gas?
A lively video that gives more detail about gases.
Running time: 4:12
The Three States of Matter Song
A catchy song to help you learn facts about the states of matter.
Running time: 1:39
Solid, Liquid, Gas
A lively overview of the three states.
Running time: 0:56
Are you teaching your children about other topics? Explore our full collection of guides!