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9.1.4 How carbon dioxide decreased
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Three routes removed carbon dioxide

Three routes removed carbon dioxide

Flowchart showing photosynthesis, ocean dissolution and burial as three routes that moved carbon from atmospheric carbon dioxide into biomass, carbonate rock and fossil fuels

Earth's early atmosphere was rich in carbon dioxide, CO2\text{CO}_2CO2​. Its proportion fell because carbon was transferred from the atmosphere into living organisms, the oceans, rocks and fossil fuels.

9.1.4 How carbon dioxide decreased Lesson

  1. GCSE
  2. /Chemistry
  3. /9.1.4 How carbon dioxide decreased

Step-by-step lessons on AQA GCSE Chemistry 9.1.4 How carbon dioxide decreased. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons