Planetary scientists are studying a young exoplanet, Kepler-186f, which has an atmosphere rich in carbon dioxide, highly resembling Earth's early atmosphere.
Explain two distinct natural processes that would cause the percentage of carbon dioxide in this planet's atmosphere to decrease significantly over geological time, assuming Earth-like conditions develop.
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.
