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CBSE-IX-Social-Science

04: Climate

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    4 - Climate
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    Section : I
    SECTION I Page No 39:
  • Qstn #1
    Choose the right answer from the four alternatives given below.
  • Qstn #1-i
    Which one of the following places receives the highest rainfall in the world?

    -(a) Silchar
    (c) Cherrapunji
    (b) Mawsynram
    (d) Guwahati
    Ans : Which one of the following places receives the highest rainfall in the world?

    (b) Mawsynram
  • Qstn #1-ii
    The wind blowing in the Northern Plains in the summers is known as

    -(a) Kaal Baisakhi
    (c) Trade Winds
    (b) Loo
    (d) None of the above
    Ans : The wind blowing in the Northern Plains in the summers is known as

    (b) Loo
  • Qstn #1-iii
    Which one of the following causes rainfall during winters in north-western part of India?

    -(a) Cyclonic depression
    (c) Western disturbances
    (b) Retreating monsoon
    (d) Southwest monsoon
    Ans : Which one of the following causes rainfall during winters in north-western part of India?

    (c) Western disturbances
  • Qstn #1-iv
    Monsoon arrives in India approximately in

    -(a) Early May
    (c) Early June
    (b) Early July
    (d) Early August
    Ans : Monsoon arrives in India approximately in

    (c) Early June
  • Qstn #1-v
    Which one of the following characterises the cold weather season in India?

    -(a) Warm days and warm nights
    (c) Cool days and cold nights
    (b) Warm days and cold nights
    (d) Cold days and warm nights
    Ans : Which one of the following characterises the cold weather season in India?

    (b) Warm days and cold nights
  • Qstn #2
    Answer the following questions briefly.
  • Qstn #2-i
    What are the controls affecting the climate of India?
    Ans : The controls affecting the climate of India are: latitude, altitude, pressure and wind system, distance from the sea, ocean currents and relief features.
  • Qstn #2-ii
    Why does India have a monsoon type of climate?
    Ans : The climate of India is strongly influenced by monsoon winds. Hence, it has a monsoon type of climate.
  • Qstn #2-iii
    Which part of India does experience the highest diurnal range of temperature and why?
    Ans : The north-western part of India comprising the Indian Desert experiences the highest diurnal range of temperature. This is because of the fact that sand (found in ample quantity in this region) gains and loses heat very quickly. As a result of this phenomenon, there is a wide difference between day and night temperatures in this region. The day temperature may rise to 50°C and drop down to near 15°C the same night.
  • Qstn #2-iv
    Which winds account for rainfall along the Malabar Coast?
    Ans : The south-west monsoon winds are responsible for rainfall along the Malabar Coast.
  • Qstn #2-v
    What are jet streams and how do they affect the climate of India?
    Ans : Jet streams are a narrow belt of high-altitude winds in the troposphere. The sub-tropical westerly jet stream blowing south of the Himalayas are responsible for the western cyclonic disturbances experienced in the north and north-western parts of the country during the winter months. The sub-tropical easterly jet stream blowing over peninsular India is responsible for the tropical cyclones that affect the eastern coastal regions of India during the monsoon as well as during the October to November period.
  • Qstn #2-vi
    Define monsoons. What do you understand by “break” in monsoon?
    Ans : Monsoon refers to the complete reversal of winds over a large area leading to a change of seasons.

    “Break” in monsoon refers to the wet and dry spells of the monsoon. In other words, the monsoon rains take place for a few days at a time. They are interspersed with rainless intervals.
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