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6. If the iceberg in the above question is floating on the ocean, how much water will it displace, according to Archimedes principle? (take the density of water as 1000 kg/m3)

  • 2m3
  • 2.17m3
  • 3.45m3
  • 1000m3

7. In waves in deep water, the water particles beneath the waves travel in circles as the wave goes past. For a particle at the surface, at what speed will it move round the circle if the wave height is 2 metres and the wave period is 10 seconds?

  • 63 centimetres per second
  • 63 metres per second
  • 1 metre per second
  • 0.1 metre per second

8. Why is there an inflow of surface water through the Strait of Gibraltar to the Mediterranean Sea?

  • It replaces water lost from the Med by evaporation
  • It is driven by the prevailing westerly winds
  • It replaces water lost from the Med through the Suez canal
  • It replaces water lost by the Med through a small crack in the sea floor

9. What is the pressure in the ocean (in atmospheres) at a depth of 200 metres?

  • 2000 atm
  • 21 atm
  • 201 atm
  • 1 atm

10. Which of the following best describes a water mass?

  • A body of water formed at the same place in the ocean with a characteristic temperature and salinity
  • The mass of water in a particular ocean. E.g Indian
  • A particularly heavy piece of water
  • Temperature divided by salinity

11. 8) Densest water is found at the bottom of the ocean. If cold water lies on top of warm it will sink – a process called convection. The atmosphere actually gets colder as you go up, so cold air lies on top of warm. Why doesn’t the cold air sink?

  • The air is too light so it cannot sink
  • Because of the spin of the earth - the Coriolis effect
  • As you go up, the air becomes less dense because the pressure decreases. This counteracts the effect of the cooling
  • The pressure of the air below holds it up

12. You are standing in the centre of a Merry-go-round which is turning in an anticlockwise sense. If you walk away from the centre, which sort of deflecting force will you feel?

  • Towards the centre
  • One towards the left
  • One towards the right
  • Towards the edge

13. Which way would you expect air to circulate in a region of low pressure in the northern hemisphere?

  • Anti-clockwise
  • Clockwise
  • Upwards
  • Towards the centre

14. In deep water, waves with long period go faster. What name do we give to this effect?

  • dispersion
  • refraction
  • diffraction
  • convection

15. What volume of the iceberg will therefore be visible above the ocean surface?

  • 0.17m3
  • None
  • 1m3
  • 56m3