GCSE AQA Chemistry Topic 9- Chemistry of the Atmosphere Test Questions Well Answered 100% 2024.

What is the % of nitrogen in our current atmosphere? - Answer 80 What is the % of oxygen in our current atmosphere? - Answer 20 What is the % of carbon dioxide in our current atmosphere? - Answer 0.04 What is the % of argon in our current atmosphere? - Answer 0.9 Describe how the early atmosphere was formed? - Answer Frequent volcanic eruptions released gases Name the main gases in the early atmosphere? - Answer Carbon dioxide, methane, ammonia and water vapour Explain how the levels of oxygen increased. - Answer The evolution of plants caused carbon dioxide to be absorbed and changed into oxygen by photosynthesis, which is released Explain how the levels of carbon dioxide decreased. - Answer Carbon dioxide is absorbed by plants for use in photosynthesis. It is dissolves into the oceans and becomes locked up into sedimentary rocks/fossil fuels Explain how nitrogen levels increased. - Answer Ammonia + Oxygen → Nitrogen + Water Explain why nitrogen levels have remained constant in the atmosphere. - Answer Nitrogen isn't a very reactive gas Name 3 greenhouse gases. - Answer Carbon dioxide, methane and water vapour.