The latest Earth Learning Idea is
'Earth's atmosphere - step by step evolution'. This activity uses a physical model to show the development of our current atmosphere. Pupils are shown the pie chart above which shows the composition of our atmosphere today. They are then asked to model with coloured balls or counters the composition of the primeval atmosphere, details of which are provided. They then consider what happened to the water vapour, carbon dioxide and sulfur oxides. How did oxygen appear in the atmosphere?
Related activities in the category 'Earth as a system' can be found on our
website.
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