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Interpreting and interacting with earth systems

Interpreting and interacting with earth systems

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Question 24

Which process is responsible for the initial increase of oxygen levels in the Earth's early atmosphere?

A

Volcanic eruptions

B

Condensation of water vapour into oceans

C

Photosynthesis by plants and algae

D

Respiration of primitive animals

Markscheme

Interpreting and interacting with earth systems Questions

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

32 exam-style questions on OCR GCSE Chemistry Interpreting and interacting with earth systems. Each one has a worked solution and a mark scheme showing where the marks go.

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