Quick starter / summary of Earth’s early atmosphere - age, composition, origin; evidence inc. other planets, Earth’s rocks. Changes inc. photosynthesis and calcareous rocks. Future changes from burning fossil fuels. Easy, medium, hard, and rock versions. (Medium relies on colour so may be more difficult for pupils with red-green colour blindness). .doc and .pdf of all files. Answer sheet - marking is VERY easy. Can be done at home or school, on paper or digitally. Get 25% offwith the GCSE Chemistry Bundle!
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