Science KS 3 Unit 8F Compounds and mixtures

In this unit pupils:

• distinguish between elements and compounds and how they are represented by symbols and formulae.
• recognise chemical change as a process in which atoms join together in new ways.
• distinguish between compounds and mixtures.
• distinguish between chemical reactions in which new compounds are formed and the formation of mixtures.

In scientific enquiry pupils:

• decide how many measurements are needed for reliable results.
• present data as graphs.
• interpret and draw conclusions from observations and graphs.
• investigate temperature changes as liquids cool.

This unit is expected to take approximately 7.5 hours.

OTHER RESOURCES

• cards showing the symbols of elements and compounds and corresponding descriptions
• labels from bottles of mineral water, showing composition
• samples of rocks that are mixtures
• samples of everyday materials that are mixtures, eg milk powder, cola
• sources of information, eg video clips, about the composition of air and the uses of its constituents, eg British Oxygen leaflets
• database software and other data sources showing melting points and boiling points of elements and compounds
• temperature sensor and software
• simulation software illustrating particles present in elements, compounds and mixtures