Question detail
Why is it important to know the percentage composition of gases in the Earth's atmosphere?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
The composition and evolution of the Earth's atmosphere
Question
Why is it important to know the percentage composition of gases in the Earth's atmosphere?
Answer
Knowing the percentage composition of gases in the Earth's atmosphere is important because it helps us understand the conditions for life, the processes of climate change, and the role of different gases in environmental systems.
Explanation
A strong answer should directly address the approved learning objective to interpret simple data showing the proportions of gases in the atmosphere. This question belongs to The proportions of different gases in the atmosphere within The composition and evolution of the Earth's atmosphere, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to atmosphere, and keeps the wording specific to AQA GCSE revision.
Common mistake
Misinterpreting Gas Proportions
Students often misinterpret data showing the proportions of gases in the atmosphere, confusing the percentages of nitrogen and oxygen.
To fix this, carefully review the data and remember that nitrogen makes up about 80% and oxygen about 20% of the atmosphere.
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