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What was the main gas in the Earth's early atmosphere? A Ammonia B Carbon dioxide C Nitrogen D Oxygen - OCR Gateway - GCSE Chemistry - Question 9 - 2023 - Paper 2
Question 9
What was the main gas in the Earth's early atmosphere? A Ammonia B Carbon dioxide C Nitrogen D Oxygen
Worked Solution & Example Answer:What was the main gas in the Earth's early atmosphere? A Ammonia B Carbon dioxide C Nitrogen D Oxygen - OCR Gateway - GCSE Chemistry - Question 9 - 2023 - Paper 2
Step 1
Determine the main gas in the Earth's early atmosphere
Answer
The main gas in the Earth's early atmosphere was primarily carbon dioxide (CO₂). This gas was predominant due to volcanic outgassing and other geological processes. While ammonia, nitrogen, and some other gases were present, carbon dioxide played a critical role in shaping the early climate and conditions on Earth.