What causes the monsoon? The monsoon, which is essentially the seasonal
reversal in wind direction, causes most of the rainfall received in India and some
other parts of the world. The primary cause of monsoons is the difference between
annual temperature trends over land and sea. The apparent position of the Sun with
reference to the Earth oscillates from the Tropic of Cancer to the Tropic of
Capricorn. Thus the low pressure region created by solar heating also changes
latitude. The northeast and southeast trade winds converge in this low pressure
zone, which is also known as the Inter tropical Convergence Zone or ITCZ. This
low pressure region sees continuous rise of moist wind from the sea surface to the
upper layers of the atmosphere, where the cooling means the air can no longer hold
so much moisture resulting in precipitation. The rainy seasons of East Asia, subSaharan Africa, Australia and the southern part of North America coincide with the
shift of ITCZ towards these regions.
Unseen Passage with questions and answers class 7 passage 4:
Q1: Monsoon is
(a) A type of sea wave
(b) a seasonal reversal in wind direction
(c) very hot wind
(d) very cold wind
Q2: What is the full form of ITCZ?(a) Intertrance Convergence Zone
(b) Intertropical Convergence Zone
(c) Intertropical Capricorn Zone
(d) Intertropical Conveyance Zone
Q3: The major cause of monsoon is the
(a) difference between annual temperature trends over land and sea
(b) difference between day and night temperature
(c) moisture in the atmosphere
(d) None of these.
Q4: Low Pressure region is created by
(a) solar heating (b) lunar cooling (c) moist wind (d) dry wind.
Q5: It rains when
(a) moist wind goes down
(b) dry wind meets moist wind
(c) the air can no longer hold moisture resulting in precipitation
(d) annual temperature goes down.
Answers
Answered by
70
Answer:
Q1) b
Q2) b
Q3) a
Q4) a
Q5) c
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Answered by
10
Answer:
All answers are given in the explanation below.
Explanation:
We have to answer the questions on the basis of the passage. The answers will be:
A1. Monsoon is (b) a seasonal reversal in wind direction.
A2. The full form of ITCZ is the (b) Intertropical Convergence Zone.
A3. The major cause of monsoon is the (a) difference between the annual temperature trends over land and sea.
A4. The low-pressure region is created by (a) solar heating.
A5. It rains when (c) the air can no longer hold moisture, resulting in precipitation.
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