C9 0.0 / 5 ? ChemistryWriting balanced equationsGCSEAQA Created by: mayaaya5Created on: 18-02-21 22:44 What are the 3 phases of the evolution? Phase 1 – Volcanoes gave out gases Phase 2 – Oceans, Algae and Green Plants Absorbed Carbon Dioxide Phase 3 – Green Plants and Algae Produced Oxygen 1 of 5 How was the early atmosphere formed? The surface was covered in volcanoes that erupted and released lots of gases. 2 of 5 What gas was the early atmosphere most of? Carbon Dioxide and basically no oxygen. 3 of 5 What other gases did volcanic activity release? Nitrogen as well as water vapour and small amounts of methane and ammonia. 4 of 5 How are crude oil and natural gas formed? Formed from deposits of plankton. 5 of 5
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