AQA GCSE Chemistry 8462 · 4.9.1.3

How oxygen increased

Code: 4.9.1.3
In: 4.9.1 The composition and evolution of the Earth's atmosphere
Topic: 4.9 Chemistry of the atmosphere
Course: GCSE Chemistry 8462
Board: AQA

Codes and titles are read by a script from AQA's published specification and have not been checked by a person. What each point covers is in the specification itself: AQA’s specification.

Points in 4.9.1 The composition and evolution of the Earth's atmosphere

4.9.1.1 The proportions of different gases in the atmosphere
4.9.1.2 The Earth's early atmosphere
4.9.1.3 How oxygen increased
4.9.1.4 How carbon dioxide decreased