Learning objective
Explain that marine organisms used carbonates to make shells and skeletons.
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
How carbon dioxide decreased
Study support
Understand this objective
Quick explanation
Explain that marine organisms used carbonates to make shells and skeletons
- This point belongs to The composition and evolution of the Earth's atmosphere, especially How carbon dioxide decreased.
- You need to be able to explain that marine organisms used carbonates to make shells and skeletons.
- The key ideas to know are carbonates.
- 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
How do you explain marine organisms used carbonates to make shells and skeletons?
Direct answer
In Chemistry, this page helps you answer questions about marine organisms used carbonates to make shells and skeletons 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 carbonates and marine organisms.
Key terms
- carbonates: Compounds containing the carbonate ion (CO3^2-) that marine organisms use to form shells and skeletons.
- marine organisms: Living organisms that inhabit the ocean and utilize carbonates to create structures such as shells and skeletons.
Common trap
Misunderstanding Carbonate Use: Emphasize that marine organisms use carbonates to create shells and skeletons, which are crucial for their structure and protection.
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Revision notestopic notes
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Open revision notesRelated learning objectives
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- 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.
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- Distinguish the major gases in the present atmosphere from trace atmospheric gases.
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