Lesson 4.7.3.4

4.7.3.4 Deforestation Quiz: AQA Biology, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.7.3.4, Deforestation: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 7: Ecology, written with Revision Ninja.

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The 20 questions

  1. Which crop-based product drives large-scale tropical deforestation?

    • Biofuels
    • Fossil fuels
    • Bioplastics
    • Biotechnology

  2. Where has large-scale deforestation occurred?

    • Polar regions
    • Deserts
    • Open oceans
    • Tropical areas

  3. What is cleared forest land used to grow for biofuels?

    • Coral
    • Crops
    • Fish
    • Peat moss

  4. What is cleared forest used for in cattle farming?

    • Nature reserves
    • Peat bogs
    • Fishing ponds
    • Grazing land

  5. Which agricultural activity drives large-scale tropical deforestation alongside crop growing?

    • Cattle farming
    • Sheep grazing
    • Wheat farming
    • Fish farming

  6. What main effect does tropical deforestation have on biodiversity?

    • Reduced species diversity
    • Higher carbon absorption
    • Enhanced rainfall patterns
    • Increased soil fertility

  7. Which phrase best describes the process of deforestation?

    • Clearing forest land
    • Planting new trees
    • Burning farm crops
    • Damming river valleys

  8. Which crop field is a main reason for tropical deforestation in the specification?

    • Rice fields
    • Barley fields
    • Potato fields
    • Wheat fields

  9. An 800 km² tropical forest is cleared, leaving 200 km². What percentage was lost?

    • 75%
    • 80%
    • 25%
    • 60%

  10. How does clearing forests affect atmospheric carbon dioxide levels?

    • Levels remain constant
    • Levels drop rapidly
    • Levels decrease
    • Levels increase

  11. Which organisms are most negatively affected when a tropical forest is cleared?

    • Open-ocean birds
    • Desert cacti
    • Marine fish
    • Forest-dwelling species

  12. What is a major environmental impact of clearing forests for biofuel crops?

    • Lower soil erosion
    • Loss of habitat
    • Increased oxygen production
    • Higher water tables

  13. What is a major atmospheric consequence of clearing tropical forests for cattle?

    • Reduced carbon uptake
    • Reduced methane levels
    • Lower global temperatures
    • Increased oxygen uptake

  14. Besides plants, which organisms are directly harmed by deforestation?

    • Coral reef species
    • Deep-sea fish
    • Marine plankton
    • Animals and fungi

  15. Which abiotic factor increases at ground level when forest canopy is removed?

    • Light intensity
    • Soil moisture
    • Atmospheric oxygen
    • Carbon storage

  16. Which policy measure helps to protect forests from being cleared?

    • Legal clearing limits
    • Cattle farming expansion
    • Biofuel subsidies
    • Timber export tax-cuts

  17. Why does growing biofuels on cleared forest land fail to reduce net carbon emissions?

    • Biofuels emit oxygen
    • Stored carbon released
    • Crops consume nitrogen
    • Biofuels prevent rain

  18. What must be balanced against food production gains when clearing forest for cattle?

    • Loss of biodiversity
    • Higher rainfall levels
    • Lower global temperatures
    • Increased soil fertility

  19. A 600 km² forest has 40% cleared for cattle and 25% for rice fields. How much remains?

    • 390 km²
    • 210 km²
    • 360 km²
    • 240 km²

  20. What data shows if growing biofuel crops on cleared forest reduces total carbon overall?

    • Net carbon balance
    • Crop harvest weight
    • Daily rainfall volume
    • Soil pH levels

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