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GCSE Chemistry · key term
A material or process that removes a substance faster than it is released; early rocks acted as sinks for atmospheric oxygen.
Used by OCR
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Development of oxygen-rich atmosphereEarly oxygen was therefore being consumed by oxygen sinks almost as quickly as it was produced.
Use a sequence: photosynthesis released oxygen; early oxygen reacted with materials such as iron; once these oxygen sinks became depleted, oxygen accumulated in the atmosphere.
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