Ocean Currents and Tides - Practice Test 2

Attempt the quiz above first, then review every question with its correct answer and a short explanation below.

1. Q1.Which current forms the eastern boundary of the Sargasso Sea?

   • A.Gulf Stream
   • B.Canary Current✓ Correct Answer
   • C.North Atlantic Drift
   • D.North Equatorial Current

   Explanation: The Canary Current bounds it on the east.

2. Q2.The Oyashio Current is also known as:

   • A.Kurile Current✓ Correct Answer
   • B.Japan Current
   • C.Alaska Current
   • D.Aleutian Current

   Explanation: It is a cold current coming from the Kurile islands region.

3. Q3.The warm current flowing along the coast of Japan is:

   • A.Oyashio
   • B.Kuroshio✓ Correct Answer
   • C.Tsushima
   • D.Okhotsk

   Explanation: Kuroshio (Japan Current) is the Pacific equivalent of the Gulf Stream.

4. Q4.Which current flows along the west coast of Australia?

   • A.East Australian Current
   • B.West Australian Current✓ Correct Answer
   • C.South Australian Current
   • D.Leeuwin Current

   Explanation: The West Australian Current is a cold current.

5. Q5.The West Australian Current is:

   • A.Warm
   • B.Cold✓ Correct Answer
   • C.Neutral
   • D.Seasonal

   Explanation: It brings cool water northwards.

6. Q6.Which ocean has currents that change direction with the season?

   • A.Pacific
   • B.Atlantic
   • C.Indian✓ Correct Answer
   • D.Arctic

   Explanation: The North Indian Ocean currents reverse due to Monsoons.

7. Q7.The Falkland Current is located in:

   • A.South Atlantic✓ Correct Answer
   • B.North Atlantic
   • C.South Pacific
   • D.Indian Ocean

   Explanation: It is a cold current off the coast of Argentina.

8. Q8.High tides are also called:

   • A.Flow tide / Flood✓ Correct Answer
   • B.Ebb tide
   • C.Slack water
   • D.Neap

   Explanation: The rising tide is called Flood tide or Flow.

9. Q9.Low tides are also called:

   • A.Flow
   • B.Ebb✓ Correct Answer
   • C.Spring
   • D.Surge

   Explanation: The falling tide is called Ebb tide.

10. Q10.The height of tides depends on:

    • A.Position of Sun and Moon
    • B.Configuration of coastline
    • C.Depth of water
    • D.All of the above✓ Correct Answer

    Explanation: All these factors influence tidal range.

11. Q11.The Bay of Fundy is famous for:

    • A.Highest tides in the world✓ Correct Answer
    • B.Warmest water
    • C.Coral reefs
    • D.Deepest trench

    Explanation: Located in Canada, it has the highest tidal range.

12. Q12.Which current is responsible for the Atacama Desert?

    • A.Peru (Humboldt) Current✓ Correct Answer
    • B.Brazil Current
    • C.California Current
    • D.Falkland Current

    Explanation: The cold Peru Current desiccates the air, creating the desert.

13. Q13.The Alaska Current is a:

    • A.Warm Current✓ Correct Answer
    • B.Cold Current
    • C.Deep Current
    • D.Seasonal Current

    Explanation: It is a warm current flowing into the Gulf of Alaska.

14. Q14.Grand Banks, famous for fishing, is located near:

    • A.Newfoundland✓ Correct Answer
    • B.Japan
    • C.UK
    • D.Chile

    Explanation: It is where the Labrador and Gulf Stream meet.

15. Q15.Dogger Bank is a fishing ground in:

    • A.North Sea✓ Correct Answer
    • B.Pacific Ocean
    • C.Indian Ocean
    • D.Mediterranean Sea

    Explanation: It is a shallow area in the North Sea.

16. Q16.The Benguela Current flows along:

    • A.West Africa✓ Correct Answer
    • B.East Africa
    • C.South America
    • D.Australia

    Explanation: It flows north along the west coast of Southern Africa.

17. Q17.Which current forms the 'Gyre' in the North Atlantic?

    • A.Gulf Stream, Canary, N. Equatorial✓ Correct Answer
    • B.Brazil, Benguela, S. Equatorial
    • C.Kuroshio, California, N. Equatorial
    • D.Agulhas, West Australian

    Explanation: These currents encircle the Sargasso Sea.

18. Q18.What is the average salinity of ocean water?

    • A.35 parts per thousand (ppt)✓ Correct Answer
    • B.10 ppt
    • C.50 ppt
    • D.20 ppt

    Explanation: Average salinity is 35‰ (3.5%).

19. Q19.The Dead Sea has a salinity of approximately:

    • A.240-340 ppt✓ Correct Answer
    • B.35 ppt
    • C.100 ppt
    • D.10 ppt

    Explanation: It is hypersaline, around 340 ppt.

20. Q20.Lake Van in Turkey has the highest salinity of:

    • A.330 ppt✓ Correct Answer
    • B.240 ppt
    • C.35 ppt
    • D.400 ppt

    Explanation: It is recorded around 330‰.