This unit builds on unit 9E 'Reactions of metals and metal compounds' and unit 9F 'Patterns of reactivity'. It relates to other units, particularly to aspects of photosynthesis and respiration in unit 8B 'Respiration' and unit 9C 'Plants and photosynthesis', and to units about energy - unit 8I 'Heating and cooling' and unit 9I 'Energy and electricity'.
This unit provides opportunities to revisit and revise topics met in other units in years 7 and 8. With some pupils, teachers may wish to concentrate on some of the new topics, extending activities, and with others to spend more time on revision of previous work.
This unit provides the foundation for work in key stage 4 on using chemical reactions to make new materials.
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