CBSE Class 9 Natural Science Help

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  1. saralas

    NCERT Solutions for Class 9th Biology : Chapter Fundamental Unit of Life Exercise 61

    saralas, May 17, 2014
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    2,539
    saralas
    May 17, 2014
  2. saralas

    NCERT Solutions for Class 9th Biology : Chapter Fundamental Unit of Life Exercise 59

    saralas, May 17, 2014
    Replies:
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    627
    saralas
    May 17, 2014
  3. Mahesh

    A motor car, with its glass totally closed, is parked directly under the Sun.

    Mahesh, Oct 22, 2013
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    866
    Mahesh
    Oct 22, 2013
  4. Mahesh

    Large amounts of carbon dioxide is produced during cellular respiration,

    Mahesh, Oct 22, 2013
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    0
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    528
    Mahesh
    Oct 22, 2013
  5. Mahesh

    Why is the air near busy roads more polluted than air at a distance from the busy roads?

    Mahesh, Oct 22, 2013
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    0
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    581
    Mahesh
    Oct 22, 2013
  6. Mahesh

    How does the construction of dams affect the temperature of water beyond the dam?

    Mahesh, Oct 22, 2013
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    0
    Views:
    549
    Mahesh
    Oct 22, 2013
  7. Mahesh

    How does the temperature of Earth's atmosphere remain fairly uniform during the day?

    Mahesh, Oct 22, 2013
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    0
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    860
    Mahesh
    Oct 22, 2013
  8. Mahesh

    Why does moon have very cold and hot temperature variations.

    Mahesh, Oct 22, 2013
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    0
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    1,398
    Mahesh
    Oct 22, 2013
  9. Mahesh

    When we breathe in air, nitrogen also goes inside along with oxygen. What happens to this nitrogen?

    Mahesh, Oct 22, 2013
    Replies:
    0
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    490
    Mahesh
    Oct 22, 2013
  10. Mahesh

    What would happen if all the oxygen present in the environment is converted to ozone?

    Mahesh, Oct 22, 2013
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    0
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    1,396
    Mahesh
    Oct 22, 2013
  11. Mahesh

    If there is no atmosphere around the Earth, what will happen to its temperature?

    Mahesh, Oct 22, 2013
    Replies:
    0
    Views:
    970
    Mahesh
    Oct 22, 2013
  12. Mahesh

    Why is it necessary to conserve natural resources? How can they be conserved?

    Mahesh, Oct 21, 2013
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    0
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    1,587
    Mahesh
    Oct 21, 2013
  13. Mahesh

    What are the sources of oxygen in the atmosphere?

    Mahesh, Oct 21, 2013
    Replies:
    0
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    465
    Mahesh
    Oct 21, 2013
  14. Mahesh

    Describe the carbon cycle in nature?

    Mahesh, Oct 21, 2013
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    0
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    1,115
    Mahesh
    Oct 21, 2013
  15. Mahesh

    Why is replenishment of forests necessary?

    Mahesh, Oct 21, 2013
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    0
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    1,724
    Mahesh
    Oct 21, 2013
  16. Mahesh

    Describe the steps and processes involved in nitrogen cycle?

    Mahesh, Oct 21, 2013
    Replies:
    0
    Views:
    2,423
    Mahesh
    Oct 21, 2013
  17. Mahesh

    What are the sources of soil pollution?

    Mahesh, Oct 21, 2013
    Replies:
    0
    Views:
    823
    Mahesh
    Oct 21, 2013
  18. Mahesh

    Describe the water cycle?

    Mahesh, Oct 21, 2013
    Replies:
    0
    Views:
    832
    Mahesh
    Oct 21, 2013
  19. Mahesh

    How can we control soil pollution?

    Mahesh, Oct 21, 2013
    Replies:
    0
    Views:
    1,033
    Mahesh
    Oct 21, 2013
  20. Mahesh

    What are the effects of soil pollution?

    Mahesh, Oct 21, 2013
    Replies:
    0
    Views:
    514
    Mahesh
    Oct 21, 2013
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