During the Archean eon, the cooling of the Earth led to the condensation of water vapour, forming the early oceans. This transition initiated a significant decline in the concentration of atmospheric carbon dioxide (CO2\text{CO}_2CO2).
Describe the physical and chemical processes by which the newly formed hydrosphere sequestered this atmospheric carbon dioxide into the geosphere.
Practise Edexcel GCSE Chemistry Earth and atmospheric science with exam-style questions for Foundation and Higher tier. 62 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
