GEO - Hydrosphere Model Question Paper

9th Standard

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Social Science

Time : 01:30:00 Hrs
Total Marks : 50
    6 x 1 = 6
  1. The Sunda Trench lies in the____________ ocean.

    (a)

    Atlantic

    (b)

    Pacific

    (c)

    Indian

    (d)

    Antarctic

  2. The oceanic ridge comes into existence due to

    (a)

    convergence of tectonic plates

    (b)

    divergence of tectonic plates

    (c)

    lateral movements of plates

    (d)

    stearing of plates

  3. Which of the following is not correctly matched?

    (a)

    Gulf Stream - Pacific Ocean

    (b)

    Labrador current - North Atlantic Ocean

    (c)

    Canary current - Mediterranean sea

    (d)

    Mozambique current - Indian Ocean

  4. The deepest point in the Arctic ocean is___________

    (a)

    Java Trench

    (b)

    Fram basin

    (c)

    Puerto Rico

    (d)

    South Sandwich Trench

  5. The height of the waves depends on________

    (a)

    speed of wind

    (b)

    Its duration

    (c)

    the direction

    (d)

    All of the above

  6. A very long narrow depression on the ocean floor is called

    (a)

    Guyot

    (b)

    Ridge

    (c)

    Trench

    (d)

    atoll

  7. 4 x 2 = 8
  8. Mention the four spheres of the earth.

  9. Why is earth called a Blue planet?

  10. Explain the term a) Water Table b) Aquifers

  11. Explain the terms a) Isobath b) Isohaline

  12. 5 x 1 = 5
  13. Mariana trench

  14. (1)

    Atlantic Ocean

  15. Sargasso sea

  16. (2)

    North Atlantic Ocean

  17. Heavy rains

  18. (3)

    Decreases salinity in the oceans

  19. Continental slope

  20. (4)

    Deepest point in the Pacific

  21. Green land

  22. (5)

    Second order landform

    2 x 2 = 4
  23. Spring tide and Neap tide.

  24. Tidal power and Hydel power.

  25. 2 x 2 = 4
  26. Assertion (A): Oceans are always shown in blue in maps.
    Reason(R): It indicates the natural colour of the oceans.
    A) both A and R are correct and R explains A.
    B) both A and R are correct but R does not explain A.
    C) A is correct but R is false.

  27. Assertion (A):Atolls are more common in the Atlantic ocean.
    Reason(R):The marine population at the depth is less.
    A) both A and R are correct and R explains A.
    B) both A and R are correct but R does not explain A.
    C) A is correct but R is false.

  28. 2 x 5 = 10
  29. Explain the influences of the marine resources on mankind

  30. The oceans are salty. Why?

  31. 4 x 1 = 4
  32. The northern hemisphere and the southern hemisphere are called land and water hemispheres respectively.

  33. The ocean waters are saline in nature

  34. Continental shelf provides good fishing ground.

  35. Salinity of Bay of Bengal is greater than the Arabian sea

  36. 3 x 3 = 9
  37. What is hydrological cycle?

  38. What are the factors that generate the ocean currents?

  39. What do you mean by the ocean salinity?

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