An introduction and quiz to follow up. Covers the basics of filtration and reversible/non reversible reactions.

A flash-based activity in which pupils can try to dissolve various substances in water. There is a linked quiz.

Page of links to worksheets covering topics including; solids, liquids, gases, dissolving and not dissolving, reversible and non-reversible chages and the changing states of water. Ideas for classroom activities are included on the worksheets.