What process formed Earth’s early atmosphere?
Ocean evaporation releasing gases from Earth’s crust.
Photosynthesis removing gases from Earth’s crust.
Radioactive decay releasing gases from Earth’s crust.
Volcanic activity releasing gases from Earth’s crust.
Flashcards for Edexcel GCSE Chemistry Earth and atmospheric science, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 25 cards, matched to the Edexcel GCSE Chemistry (1CH0) specification. Recall questions account for roughly 40% of marks at GCSE Chemistry, so these target the marks you can secure before the paper starts.
