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9.1.2 The Earth's early atmosphere

Why is Earth's earliest atmosphere difficult to reconstruct?

A

Dissolved carbon dioxide formed carbonates, which formed sea-floor sediments.

B

Almost no direct evidence survives from Earth's formation.

C

The early atmosphere may have been mainly extCO2\boxed{ext{CO}_2}extCO2​​ with little or no extO2ext{O}_2extO2​.

D

The early atmosphere may have been mainly extCO2ext{CO}_2extCO2​ with little or no extO2\boxed{ext{O}_2}extO2​​.

9.1.2 The Earth's early atmosphere Flashcards

  1. GCSE
  2. /Chemistry
  3. /9.1.2 The Earth's early atmosphere

Flashcards for AQA GCSE Chemistry 9.1.2 The Earth's early atmosphere, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 23 cards, matched to the AQA GCSE Chemistry (8462) specification. Recall questions account for roughly 40% of marks at GCSE Chemistry, so these target the marks you can secure before the paper starts.