MATERIALS:
States of matter 
- Nearly everything exists as solids, liquids or gases. Solids, liquids and gases are called the three states of matter.
- Materials can be changed from one state to another by heating or cooling.
- If ice (solid) is heated, it changes to water (liquid). This change is called melting.
- If water (liquid) is heated, it changes to water vapour (gas). This change is called evaporation.
- If water vapour (gas) is cooled, it changes to water (liquid). This change is called condensing.
- If water (liquid) is cooled, it changes to ice (solid). This change is called freezing.
- There are two different types of changes (physical/chemical).
- Physical is a reversible change that can be changed back (water into ice and then back to water again)
- Chemical is an irreversible change that cannot be changed back (cooking a piece of bread into toast which cannot be changed back)
Click on the link below for the ‘Changing State’ game.
