Biosphere Book Back Questions

9th Standard

    Reg.No. :
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Social Science

Time : 00:40:00 Hrs
Total Marks : 25
    3 x 1 = 3
  1. The coldest biome on Earth is

    (a)

    Tundra

    (b)

    Taiga

    (c)

    Desert

    (d)

    Oceans

  2. Nutrients are recycled in the atmosphere with the help of certain micro organisms, referred to as

    (a)

    Producers

    (b)

    Decomposers

    (c)

    Consumers

    (d)

    None of the above

  3. Why is the usage of rainforest biomes for large scale agriculture unsustainable?

    (a)

    because it is too wet

    (b)

    because the temperature is too warm.

    (c)

    because the soil is too thin

    (d)

    because the soil is poor

  4. 4 x 2 = 8
  5. What is Biosphere?

  6. What does the term ‘biodiversity’ mean?

  7. What is meant by loss of biodiversity?

  8. Narrate the given food web of Arctic Tundra in your own words.

  9. 3 x 1 = 3
  10. An area where animals, plants and micro organisms live and interact with one another is known as _________

    ()

    .Eco System

  11. ___________ is a system of interlocking and independent food chains.

    ()

    .Food web

  12. _____________ is an aquatic biome that is found where fresh water and salt water mix.

    ()

    .Estuary

  13. 1 x 2 = 2
  14. Tropical vegetation and Desert vegetation

  15. 2 x 2 = 4
  16. A: Heterotrophs do not produce their own food.
    R: They depend on autotrophs for their nourishment.
    a) Both assertion (A) and reason(R) are true; R explains A
    b) Both assertion(A) and reason(R) are true; R does not explain A
    c) A is true; R is false
    d) Both A and R are false

  17. A: Hotspots are the regions characterised by numerous endemic plants and animal species living in a vulnerable environment.
    R: To manage and focus on conservation work more effectively, researchers identified hotspots.
    a) Both assertion (A) and reason(R) are true; R explains A
    b) Both assertion(A) and reason(R) are true; R does not explain A
    c) A is true; R is false
    d) Both A and R are false

  18. 1 x 5 = 5
  19. Explain about the aquatic biomes on Earth.

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