Revision site with notes, activities and quizes. Try the quiz on the last page.

Good revision material on compounds, mixtures and separating. Try the multiple choice quiz to test your knowledge.

In the 'Build' section, test your understanding of chemical formulae by building some simple molecules. Use the 'Transform' section to see an animation of ice, water and steam changing state.

Click the i button for instructions.

Select the topic you want from the list on the right. There is a video on the homepage to help you understand how to play Gridlocks.