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Ecology and Environment
Quick questions on The carbon cycle: N(A)-Level Biology Ecology and Environment
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is taking carbon out of the air?Show answer
Carbon dioxide is removed from the air by photosynthesis. Green plants take in carbon dioxide and use light energy to make food (glucose). The carbon now becomes part of the plant. When animals eat plants, the carbon passes into the animals, and along the food chain.
What is returning carbon to the air?Show answer
Carbon dioxide is returned to the air by three main processes:
What are the role of decomposers?Show answer
Decomposers are vital. By breaking down dead matter and respiring, they return carbon (as carbon dioxide) to the air so plants can use it again. They also clear away dead material and recycle the nutrients in it. Without them, dead bodies and the carbon locked inside would pile up.
What is q1?Show answer
Name the process that removes carbon dioxide from the air. [1 mark]
What is q2?Show answer
State two processes that return carbon dioxide to the air. [2 marks]
What is q3?Show answer
Explain the role of decomposers in the carbon cycle. [2 marks]
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