1. In how many ways does seawater move?

    Three

    Four

    Five

    Six

2. What is the highest wave recorded to date?

    14 metres

    24 metres

    34 metres

    44 metres

3. Which ocean waves are caused by earthquakes or volcanic eruptions?

    Tides

    Tsunamis

    Both

    None

4. What is the percentage of salt in seawater?

    3.3% to 3.7%

    5.6% to 6.0%

    8.4% to 8.8%

    10.8% to11.2%

5. What percentage of an iceberg is hidden beneath the surface of the sea?

    About 90%

    About 80%

    About 70%

    About 60%

6. The generation of ocean thermal energy is made possible because of?

    Salt density

    Temperature difference

    Depth

    All

7. What is the range of temperature of sea water?

    -8ºc to 42ºc

    -2ºc to 29ºc

    1ºc to 22ºc

    4ºc to 18ºc

8. How many times is sea water volume more than fresh water volune on earth?

    About12

    About36

    About 49

    About 72

9. Where is the Gulf stream, a river in the ocean, located?

    South Pacific

    North Atlantic

    Indian Ocean

    Arabian Sea

10. What form of land juts out into a body of sea water?

    Atoll

    Island

    Delta

    Peninsula

11. What floats and drifts on the surface of seas and oceans?

    Nekton

    Mangrove

    Plankton

    Cowrie

12. What is the percentage of water present in the oceans on earth.

    67%

    77%

    87%

    97%