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The table shows the composition of the current atmospheres of four planets, W, X, Y and Z - Edexcel - GCSE Chemistry - Question 1 - 2018 - Paper 1
Question 1
The table shows the composition of the current atmospheres of four planets, W, X, Y and Z. Gases that form less than one per cent of the atmosphere of a planet are n... show full transcript
Worked Solution & Example Answer:The table shows the composition of the current atmospheres of four planets, W, X, Y and Z - Edexcel - GCSE Chemistry - Question 1 - 2018 - Paper 1
Step 1
Which of the planets is Earth?
Answer
To determine which planet is Earth, we analyze the atmospheric composition. Earth is known to have a high percentage of nitrogen and oxygen in its atmosphere. Looking at the table, we can see:
- Planet W: 33% nitrogen, 12% oxygen
- Planet X: 2% nitrogen, 21% oxygen
- Planet Y: 78% nitrogen, 42% oxygen
Given that Planet Y has a high concentration of both nitrogen and oxygen, it most closely resembles Earth's atmosphere. Therefore, the answer is:
- Planet Y