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The Earth’s early atmosphere contained larger amounts of water vapour and carbon dioxide than it does today - Edexcel - GCSE Chemistry - Question 1 - 2016 - Paper 1
Question 1
The Earth’s early atmosphere contained larger amounts of water vapour and carbon dioxide than it does today. Explain how the amounts of water vapour and carbon diox... show full transcript
Worked Solution & Example Answer:The Earth’s early atmosphere contained larger amounts of water vapour and carbon dioxide than it does today - Edexcel - GCSE Chemistry - Question 1 - 2016 - Paper 1
Step 1
Explain how the amounts of water vapour and carbon dioxide in the Earth's atmosphere decreased.
Answer
In the early atmosphere, water vapour was abundant and eventually condensed into liquid water, forming the oceans. This process reduced the amount of water vapour in the atmosphere. Additionally, carbon dioxide decreased as it was absorbed by water bodies, forming carbonates through processes like sedimentation and chemical reactions.
Step 2
Describe how the presence of carbon dioxide in the atmosphere helps to keep the Earth warm.
Answer
Carbon dioxide acts as a greenhouse gas by trapping heat radiated from the Earth's surface. This heat is then re-emitted back towards the surface, helping to maintain a warm environment and stabilize the planet's temperature.
Step 3