Earth's atmosphere To test your knowledge of the Earth's atmosphere 3.0 / 5 based on 1 rating ? ChemistryThe earth and its atmosphereGCSEAQA Created by: Brij HareCreated on: 20-11-12 12:48 Percentage of Nitrogen in the air 78% 1 of 7 Percentage of Oxygen in the air 21% 2 of 7 Percentage of Argon in the air 0.9% 3 of 7 Percentage of Carbon Dioxide in the air 0.04% 4 of 7 How long ago was the Earth formed 4.5 billion years ago 5 of 7 What was the early atmosphere made of Carbon Dioxide 6 of 7 What formed that gasses Volcanoes 7 of 7
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