Biodiversity & global warming
Edexcel GCSE Biology revision on Biodiversity & global warming. Aligned to the Pearson Edexcel GCSE Biology 1BI0 specification. This bank has 5 practice questions on this topic.
Sample questions (3 of 5)
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Question 1
Which primary gas released by human activities is most responsible for the enhanced greenhouse effect?
- A) Nitrogen gas
- B) Carbon dioxide
- C) Sulfur dioxide
- D) Argon gas
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Answer: Carbon dioxide
While nitrogen makes up most of the atmosphere, it is not a greenhouse gas. Carbon dioxide is released in massive quantities through human activities like burning coal, oil, and gas, which traps heat in the atmosphere.
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Question 2
How does the destruction of peat bogs contribute to rising atmospheric carbon dioxide levels?
- A) Release of stored carbon
- B) Increases soil acidity
- C) Reduces oxygen output
- D) Blocks water drainage
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Answer: Release of stored carbon
Peat bogs contain partially decayed plant material that has trapped carbon for thousands of years. When drained for farming or harvested for fuel, this carbon oxidises and enters the atmosphere as carbon dioxide, accelerating global warming.
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Question 3
Which biological process is responsible for the removal of carbon dioxide from the atmosphere to maintain global balance?
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Answer: Photosynthesis
Photosynthesis is the key process where autotrophs convert carbon dioxide and water into glucose and oxygen. By locking carbon into biomass, plants act as essential carbon sinks that help mitigate the effects of climate change.
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2 more questions on Biodiversity & global warming — plus mistakes tracking and spaced repetition across the whole Biology spec.