The Earth's atmosphere today is a mixture of different gases.
Which of these options lists the three most abundant gases in clean, dry air, in order from the highest percentage to the lowest percentage?
oxygen, nitrogen, carbon dioxide
nitrogen, oxygen, argon
nitrogen, carbon dioxide, oxygen
oxygen, nitrogen, argon
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.
