Unit 3 - Chemical Substances
Unit 3: Chemical Substances
In this third unit, you will learn about different types of chemical substances, how we recognise them and how they behave.
You will also be introduced to chemical reactions, and how these are different to the physical changes you have already learnt about in unit 2 (and in primary school).
Atoms and Elements
Elements, Compounds and Mixtures
Pure and Impure substances
Filtration, Evaporation and Crystallisation
Physical and chemical changes