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How Materials Are Cycled (GCSE Biology)

The following is a GCSE Biology test covering 'How Materials Are Cycled' from the broader topic Ecology. The test is geared towards the AQA exam board style syllabus.
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What is the primary reason that wetlands are important in nutrient cycling and water quality?
Which process removes carbon dioxide from the atmosphere and stores it in plant biomass?
How does increased nitrogen fertiliser use on farmland commonly affect the nitrogen cycle?
Why do peat bogs act as important carbon stores?
How does deforestation typically affect the carbon cycle locally?
Why is preserving biodiversity important for ecosystem nutrient cycling?
What is meant by a “carbon sink”?
What is the main reservoir (largest store) of carbon on Earth on a long timescale?
Which process releases nitrogen gas back into the atmosphere from soil nitrate?
What role do microorganisms play in nutrient cycling in soil?
Which practice helps protect peat as a carbon store?