Chemistry GCSE
Earth’s first billion years
What Earth’s first billion years means in Chemistry GCSE, as defined for AQA.
Definition of Earth’s first billion years
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Reference: AQA
During the first billion years of the Earth’s existence there was intense volcanic activity that released gases and water vapour.
Topics that use Earth’s first billion years
- The Earth's early atmosphere (AQA GCSE)
Related terms
- Absence of oxygen
- Build-up of nitrogen in the atmosphere
- Comparison with Mars and Venus
- Composition of the early atmosphere
- Condensation and the formation of oceans
- Development of scientific theories
- Earth's early atmosphere
- Evidence and revision
Using Earth’s first billion years in the exam
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