Supplied with well-written photocopiable Teacher’s Notes and supplied in a deep storage tray with lid. Suitable for group or individual work. Activities include: Comparing liquids and solids, Similarities between solids and liquids, What happens when solids are heated?, How do we separate a mixture of solids?, What is the difference in melting and dissolving?, Defining solids, liquids and gases, What changes occur when materials are mixed?, Mixing materials, Separating materials, Changing materials.