Lesson 1.2.4

1.2.4 To what extent are the water and carbon cycles linked? Quiz: OCR Geography, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 1.2.4, To what extent are the water and carbon cycles linked?: 20 multiple choice questions for the OCR Geography (H481), Unit 2: Earth's Life Support Systems, written with Revision Ninja.

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The 20 questions

  1. Which key process transfers carbon from the atmosphere into terrestrial vegetation stores?

    • Combustion
    • Photosynthesis
    • Respiration
    • Decomposition

  2. How does phytoplankton activity in oceans link marine carbon and water cycles?

    • Ocean acidification
    • Thermal expansion
    • Carbonate compensation
    • Biological carbon pump

  3. What effect does ocean warming have on the ocean's capacity to absorb carbon dioxide?

    • Increases absorption
    • Decreases absorption
    • Halts ocean currents
    • Halves evaporation

  4. Which management strategy restores water storage and reduces emissions from degraded peatlands?

    • Contour ploughing
    • Wetland restoration
    • Carbon capture
    • Afforestation

  5. What strategy involves planting trees to increase both carbon storage and evapotranspiration?

    • Crop rotation
    • Drainage basin planning
    • Afforestation
    • Water allocation

  6. Which international treaty legally binds signatory nations to reduce greenhouse gas emissions?

    • Paris Agreement
    • Montreal Protocol
    • Water Framework Directive
    • Ramsar Convention

  7. Which water management approach manages river catchments holistically to regulate surface run-off?

    • Water allocation
    • Carbon trading
    • Drainage basin planning
    • Selective logging

  8. What process releases stored organic carbon from permafrost as atmospheric temperatures rise?

    • Deposition
    • Sublimation
    • Freezing
    • Thawing

  9. If deforestation occurs in the Amazon basin, what immediate impact occurs to local humidity?

    • Increases humidity
    • Decreases humidity
    • Fluctuates randomly
    • Unchanged humidity

  10. A farmer reduces soil tilling and leaves crop residues intact. What main carbon benefit occurs?

    • Reduced photosynthesis
    • Increased methane emission
    • Higher surface run-off
    • Soil carbon sequestration

  11. Higher temperatures cause increased evaporation, increasing water vapour and causing further warming. What mechanism is this?

    • Static balance
    • Dynamic equilibrium
    • Positive feedback loop
    • Negative feedback loop

  12. Which human activity directly transfers long-term terrestrial carbon stores straight into the atmosphere?

    • Fossil fuel combustion
    • Commercial afforestation
    • Groundwater abstraction
    • Overgrazing livestock

  13. How does improved forestry management, like reduced-impact logging, protect local water quality?

    • Halts evapotranspiration
    • Eliminates precipitation
    • Increases surface run-off
    • Reduces soil erosion

  14. A government caps national carbon emissions and allows firms to buy and sell credits. Name this system.

    • Carbon trading
    • Carbon offsetting grant
    • Cap-and-share tax
    • Water allocation

  15. What happens to drainage basin water storage when inputs exceed total outputs?

    • Flutuates
    • Remains constant
    • Increases
    • Decreases

  16. What happens to forest carbon uptake when severe climate-induced drought affects tropical trees?

    • Carbon uptake decreases
    • Carbon uptake doubles
    • Carbon storage stabilises
    • Carbon uptake triples

  17. How does melting cryospheric ice disrupt the marine carbon cycle via oceanic flow changes?

    • Increases ocean salinity
    • Enhances deep-sea uptake
    • Increases surface density
    • Slows thermohaline circulation

  18. Which weathering process absorbs atmospheric carbon dioxide and carries dissolved ions into river systems?

    • Carbonation
    • Hydrolysis
    • Chelation
    • Oxidation

  19. How can artificial cloud seeding affect local hydrology and subsequent terrestrial carbon uptake?

    • Increases precipitation
    • Decreases evapotranspiration
    • Eliminates photosynthesis
    • Halts infiltration

  20. What is the primary goal of establishing water allocation quotas across different economic sectors?

    • Sustainable water management
    • Total flood elimination
    • Maximum carbon capture
    • Maximising industrial output

All OCR Geography quizzes