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6.3 Interpreting and interacting with earth systems

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Question 39

Scientists have estimated the amounts of carbon in two carbon stores today.

Carbon storeEstimated amount of carbon in gigatonnes
Earth's atmosphere900
Limestone rocks60 000 000

A scientist claims that these estimates prove that the Earth's early atmosphere was mainly carbon dioxide.

Use the data to evaluate the scientist's claim.

[3]
Markscheme

6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

109 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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