Learning objective
Describe limestone, coal, crude oil and natural gas as long-term carbon stores.
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Topic
The composition and evolution of the Earth's atmosphere
Subtopic
How carbon dioxide decreased
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Quick explanation
Describe limestone, coal, crude oil and natural gas as long-term carbon stores
- This point belongs to The composition and evolution of the Earth's atmosphere, especially How carbon dioxide decreased.
- You need to be able to describe limestone, coal, crude oil and natural gas as long-term carbon stores.
- The key ideas to know are limestone, coal, and crude oil.
- 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 How carbon dioxide decreased to exam-style questions, flashcards, and revision notes for The composition and evolution of the Earth's atmosphere.
Quick student answer
What are limestone, coal, crude oil and natural gas?
Direct answer
In Chemistry, this page helps you answer questions about limestone, coal, crude oil and natural gas 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 limestone and fossil fuels.
Key terms
- limestone: A sedimentary rock primarily composed of calcium carbonate, formed from the remains of marine organisms and acts as a long-term carbon store.
- fossil fuels: Natural substances such as coal, crude oil, and natural gas formed from the remains of dead organisms, serving as long-term carbon stores.
Common trap
Misunderstanding Carbon Stores: Clarify that limestone is a sedimentary rock, while coal, crude oil, and natural gas are fossil fuels formed from organic matter.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Recall that the Earth's atmosphere is about 80 percent nitrogen.
The proportions of different gases in the atmosphere
- 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