Learning objective
Recall that the Earth's atmosphere is about 80 percent nitrogen.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
The composition and evolution of the Earth's atmosphere
Subtopic
The proportions of different gases in the atmosphere
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Understand this objective
Quick explanation
Recall that the Earth's atmosphere is about 80 percent nitrogen
- This point belongs to The composition and evolution of the Earth's atmosphere, especially The proportions of different gases in the atmosphere.
- You need to be able to recall that the Earth's atmosphere is about 80 percent nitrogen.
- The key ideas to know are nitrogen and atmosphere.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect The proportions of different gases in the atmosphere to exam-style questions, flashcards, and revision notes for The composition and evolution of the Earth's atmosphere.
Quick student answer
What should you know about the Earth's atmosphere is about 80 percent nitrogen?
Direct answer
In Chemistry, this page helps you answer questions about the Earth's atmosphere is about 80 percent nitrogen within The composition and evolution of the Earth's atmosphere. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are nitrogen and atmosphere.
Key terms
- nitrogen: In The proportions of different gases in the atmosphere, nitrogen means a colorless, odorless gas that makes up about 80 percent of the Earth's atmosphere. This matters in The composition and evolution of the Earth's atmosphere because it supports the learning objective to recall that the Earth's atmosphere is about 80 percent nitrogen. Use nitrogen only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.
- atmosphere: In The proportions of different gases in the atmosphere, atmosphere means the layer of gases surrounding the Earth, composed primarily of nitrogen and oxygen. This matters in The composition and evolution of the Earth's atmosphere because it supports the learning objective to recall that the Earth's atmosphere is about 80 percent nitrogen. Use atmosphere only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.
Common trap
Nitrogen Proportion Confusion: To fix this, students should remember that nitrogen makes up the majority of the atmosphere at about 80 percent, while oxygen is around 20 percent.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Recall that the Earth's atmosphere is about 20 percent oxygen.
The proportions of different gases in the atmosphere
- Recall that the Earth's atmosphere contains small proportions of other gases including carbon dioxide, water vapour and noble gases.
The proportions of different gases in the atmosphere
- Interpret simple data showing the proportions of gases in the atmosphere.
The proportions of different gases in the atmosphere
- Distinguish the major gases in the present atmosphere from trace atmospheric gases.
The proportions of different gases in the atmosphere
- Explain why percentage composition is useful when describing atmospheric gases.
The proportions of different gases in the atmosphere