| What is material made of? |
The idea that matter can be divided into very small pieces Simple pictures of solids, liquids and gases. Properties of solids, liquids and gases related to their uses (e.g. steel for railway lines, liquid brake fluid and air for inflating tyres) |
| Changes of State |
How to convert between solid, liquid and gas Classification of unknown substances using melting and boiling temperature information |
| Diffusion |
Understanding the process of diffusion How the size of particles affects their speed of diffusion Diffusion in liquids |
| Kinetic Theory |
Energy changes that accompany changes of state Interpretation of changes of state using Kinetic Theory Explanation of expansion when materials are heated and change state The effect of purity on melting and boiling temperature Using Kinetic Theory to explain how gases exert a pressure |
| Different Sorts of Particles |
Elements, compounds, pure substances and mixtures. Atoms and molecules Chemical symbols for elements |