Rock and Soil Important Questions

8th Standard EM

    Reg.No. :
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Social Science

Time : 01:00:00 Hrs
Total Marks : 50
    5 x 1 = 5
  1. Which of the following is known as sphere of rocks

    (a)

    Atmosphere

    (b)

    Biosphere

    (c)

    Lithosphere

    (d)

    Hydrosphere

  2. The major component of soil is

    (a)

    Rocks

    (b)

    Gas

    (c)

    Water

    (d)

    Minerals

  3. Which one of the following is the most widespread most and productive category of soil

    (a)

    Alluvial soil

    (b)

    Black soil

    (c)

    Red soil

    (d)

    Mountain soil

  4. This soil is not suitable for agriculture

    (a)

    Alluial Soil

    (b)

    Desert Soil

    (c)

    Black Soil

    (d)

    Laterite Soil

  5. Oldest sedimentary rocks of the world has been identified in ________

    (a)

    Greenland

    (b)

    Newzeland

    (c)

    England

    (d)

    Ireland

  6. 6 x 1 = 6
  7. Scientific study of rocks is called ________.

    ()

    petrology

  8. The “skin of earth” is _________.

    ()

    soil

  9. _________ is known as the primary rocks.

    ()

    Igneous rocks

  10. Ignis means _____

    ()

    Fire

  11. Meta means _______

    ()

    change

  12. _____, _____ are the two types intrusive Igneous rocks.

    ()

    Plutonic rocks, Hypabysal rocks

  13. 5 x 1 = 5
  14. Igneous rocks are called primary rocks.

    (a) True
    (b) False
  15. Red soil is formed by the process of leaching.

    (a) True
    (b) False
  16. Volcanic mountains are covered with sedimentary rocks.

    (a) True
    (b) False
  17. The ligneous rocks are formed by the solidification of molten magma.

    (a) True
    (b) False
  18. The presence of iron oxide makes red soil brown to red in colour.

    (a) True
    (b) False
  19. 5 x 1 = 5
  20. Soil layer

  21. (1)

    Metamorphic rock

  22. Soil conservation

  23. (2)

    Strip farming

  24. Limestone

  25. (3)

    Anthracite

  26. Gneiss

  27. (4)

    Bed rock

  28. Soil Erosion

  29. (5)

    Wind

    2 x 2 = 4
  30. Metamorphic rock and sedimentary rock.

  31. Soil conservation and Soil erosion.

  32. 3 x 2 = 6
  33. a) Igneous rocks are called the primary rocks.
    b) Soil is the product of weathering of rocks.
    c) Sedimentary rocks are the hardest ones.
    d) Deccan plateau is the region of Igneous rocks.

  34. a) Soil erosion decreases its fertility.
    b) Dynamic metamorphism is caused by high temperature.
    c) Soil is a renewable source.
    d) Humus is a part of the top layer of soil.

  35. a) Soil acts as natural filter of water and purifies it.
    b) Soils are produced from rocks through the processes of weathering.
    c) Black soil is not suitable for cotton growing
    d) Soil supports ecosystem and play an important role.

  36. 3 x 3 = 9
  37. How are igneous rocks formed?

  38. Define ‘rock’.

  39. What is soil conservation?

  40. 2 x 5 = 10
  41. Classify and explain the rocks.

  42. Classify and explain the soil?

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