3.3.1 What are the main characteristics of oceans? Quiz: OCR Geography, Unit 7

The 20 questions

1. Which feature is a flat-topped underwater mountain formed by seamount erosion?

   • Ocean trench
   • Guyot
   • Abyssal plain
   • Mid-ocean ridge

2. How far from a baseline do standard Territorial Waters extend under UNCLOS?

   • 200 nautical miles
   • 24 nautical miles
   • 12 nautical miles
   • 350 nautical miles

3. What type of ocean energy resource are wave and tidal power classified as?

   • Critical resources
   • Stock resources
   • Non-renewable resources
   • Flow resources

4. Which ocean basin feature typically lies between the continental slope and abyssal plain?

   • Ocean trench
   • Ocean ridge
   • Continental shelf
   • Continental rise

5. What term describes ocean areas beyond national jurisdiction open to all states?

   • Territorial waters
   • High seas
   • Contiguous zone
   • Exclusive Economic Zone

6. What happens to ocean salinity in areas of high evaporation and low rainfall?

   • It increases
   • It stays constant
   • It drops rapidly
   • It decreases

7. What concept describes the overexploitation of shared ocean resources without individual ownership?

   • Sustainable yield
   • Ocean acidification
   • Bycatch depletion
   • Tragedy of the commons

8. Which marine zone in the ocean receives no sunlight whatsoever for photosynthesis?

   • Aphotic zone
   • Bathyal zone
   • Euphotic zone
   • Photic zone

9. A vessel operates 150 nautical miles off a coast. Within which marine zone is it?

   • Contiguous zone
   • Territorial waters
   • High seas
   • Exclusive Economic Zone

10. Which ocean current carries warm surface water northwards towards Northwest Europe?

    • Gulf Stream
    • Canary Current
    • Labrador Current
    • Benguela Current

11. Why is primary biological productivity typically highest in shallow coastal intertidal zones?

    • Low nutrient supply
    • Continuous deep darkness
    • High light availability
    • High hydrostatic pressure

12. Polymetallic nodules found on the deep seabed are examples of which resource type?

    • Recyclable flow resource
    • Biological renewable resource
    • Non-renewable mineral
    • Flow energy resource

13. In North Atlantic circulation, what causes cold surface ocean water to sink?

    • High water temperature
    • Reduced water pressure
    • High water density
    • Low surface salinity

14. A coastal zone extending up to 24 nautical miles to enforce immigration rules is the:

    • Territorial waters
    • Exclusive Economic Zone
    • Contiguous zone
    • High seas

15. Which ecosystem relies primarily on chemosynthesis or falling marine snow for energy?

    • Surface pelagic zone
    • Coral reef zone
    • Deep-water ecosystem
    • Intertidal ecosystem

16. What term defines the maximum catch limit allowed to maintain sustainable fish stocks?

    • Total allowable effort
    • Tragedy threshold limit
    • Critical biomass limit
    • Maximum sustainable yield

17. How does ocean water temperature change with depth through the tropical thermocline?

    • Uniform linear increase
    • Rapid temperature decline
    • Constant high warmth
    • Gradual temperature rise

18. Which wind-driven movement of surface water causes coastal upwelling of cold nutrients?

    • Deep subduction
    • Atmospheric subsidence
    • Ekman transport
    • Thermohaline convection

19. Why do deep-water marine ecosystems generally support lower overall biodiversity than intertidal zones?

    • Constant wave action
    • Limited energy input
    • Highly variable salinity
    • Excessive sunlight exposure

20. What maximum distance from a baseline can an Exclusive Economic Zone legally extend?

    • 200 nautical miles
    • 350 nautical miles
    • 12 nautical miles
    • 24 nautical miles

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