Exam (elaborations)
AQA GCSE CHEMISTRY Foundation Tier Paper 2F June 2021 QP
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This question is about the Earth’s atmosphere. box 0 1 . 1 How long ago was the Earth formed? [1 mark] Tick () one box. 4.6 billion years ago 4.6 million years ago 4.6 thousand years ago Table 1 shows the percentages of gases in the atmospheres of Mars and Earth today. Table 1 Gas Percentage of gas in atmosphere (%) Mars Earth Carbon dioxide 95.97 0.04 Nitrogen 1.89 78.09 Oxygen 0.15 20.95 Other gases 1.99 X 0 1 . 2 Calculate the percentage X of other gases in the Earth’s atmosphere. Use Table 1. [1 mark] X
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SPANISH 215.309
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SPANISH 215.309
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aqa gcse chemistry foundation tier paper 2f june 2021 qp
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this question is about the earth’s atmosphere box 0 1 1 how long ago was the earth formed 1 mark tick one box 46 billion years ago
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