In The proportions of different gases in the atmosphere, which option helps you explain the consequence in the atmosphere: Recall that the Earth's atmosphere contains small proportions of other gases including carbon dioxide, water vapour and noble gases?

The correct option is 20%. For this effect question, that option is correct because it matches Recall that the Earth's atmosphere contains small proportions of other gases including carbon dioxide, water vapour and noble gases in The proportions of different gases in the atmosphere.

20% is the correct answer for this AQA GCSE Chemistry atmosphere question. Choose the option that links the substance to its atmospheric effect. The learning objective is: Recall that the Earth's atmosphere contains small proportions of other gases including carbon dioxide, water vapour and noble gases. In The composition and evolution of the Earth's atmosphere, this means the explanation must use the subtopic The proportions of different gases in the atmosphere and avoid drifting into a different gas, pollutant, climate, or early-atmosphere idea. Checkpoint 19: this page uses the effect angle so students can practise one distinct reasoning route before moving to the next question.