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Question Pool
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2
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IN SEARCH OF THE SOURCE OF WIND
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1. Learning Outcome
• Explains the relationship between temperature and atmospheric pressure.
Observe the following diagrams and find answers to the following questions.
A B
750 mb 720 mb

740 mb 730 mb

a
730 mb al 740 mb
er
720 mb 750 mb

• Which diagram represents the low pressure region? Substantiate your answer.
K

• What is the name by which the smooth curved lines in the diagrams are
T

known? What does it indicate?

R

Score : 4, Time : 3 Minutes

Scoring Indicators
E
C

• Figure B represents the low pressure region

• The value of isobars decreases towards the centre.
S

• Isobars
• Imaginary lines joining places having equal atmospheric pressure.
2. Learning Outcome
• Classifies the different types of winds.
Distinguish between
a. Land breeze and Sea breeze
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b. Mountain breeze and Valley breeze
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Score : 4, Time : 4 Minutes
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Scoring Indicators
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8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
• Characteristic features of land and sea breezes
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• Characteristic features of mountain and valley breezes
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89
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 Social Science - II - X

3. Learning Outcome
• Illustrates the global pressure belts
Which are the pressure belts on either side of subtropical high pressure belts?
Write notes on the winds formed from this pressure belt in the northern
hemisphere. Which among these winds is most influenced by the Coriolis force?
Why?
Score : 6, Time : 8 Minutes
Scoring Indicators
• Sub polar low pressure belt and equatorial low pressure belt.
• Features of westerlies and north east trade winds.
• Westerlies are most influenced by the Coriolis force.
• Coriolis force increases while advancing from the equator.
4. Learning Outcome
• Illustrates the global pressure belts.

a
Rearrange the table on the basis of the planetary winds blowing in between
al
different pressure belts.
1. Between the sub-tropical high pressure Trade winds
er

belt and the sub polar low pressure belt.

K

2. Between the polar high pressure belt Westerlies

and the sub polar low pressure belts
T

3. Between the sub-tropical high pressure Polar winds

R

belts and the equatorial low pressure belts

E

Score : 3, Time : 3 Minutes

C

Scoring Indicators
S

1. Westerlies 2. Polar winds 3. Trade winds

5. Learning Outcome
• Describe how the pressure gradient force, Coriolis force and friction influence the
speed and direction of wind.
Read the following informations.
• The atmospheric pressure at A is 740mb and it is 730 mb at a place 10km
away from A.
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• Atmospheric pressure at B is 740mb and it is 730 mb at a place 5km away
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from B
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Which among these places experience stronger winds? Why?
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Score : 2, Time : 2 Minutes
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Scoring Indicators
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• Place B experience stronger winds
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• Pressure gradient force is more at B. The isobars are drawn close to each other.
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90
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 Question Pool

6. Learning Outcome
• Explains the relation between temperature and atmospheric pressure.
Which among the following winds are called as Roaring forties?
A. Polar winds B. Monsoon winds
C. Westerlies D. Trade winds
Score : 1, Time : 1 Minutes
Scoring Indicators
• C. Westerlies
7. Learning Outcome
• Explains the relation between and temperature and atmospheric pressure.
Identify the wrong statement among the following.
i. The location of mountains is one among the factors causing the formation
of monsoon.

a
ii. South west trade winds also moves northward with the equatorial low
al
pressure belt in the northern hemisphere during summer.
iii. South east trade winds moves northward along with the equatorial low
er
pressure belt in the northern hemisphere during summer.
iv. Coriolis effect is one of the factors influencing the formation of
K

monsoon.
T

a. i, iii and iv are correct, ii is wrong

R

b. i, ii, and iv are correct, iii is wrong

c. iii and iv are correct, i and ii are wrong
E

d. i and iv are correct, ii and iii are wrong

C

Score : 1, Time : 2 Minutes

S

Scoring Indicators
• c is the correct answer
8. Learning Outcome
• Explains that the atmospheric pressure is not uniform everywhere.
Suppose at a place A the level of mercury in the mercury barometer touches 76
cm. What may be the atmospheric pressure then? Calculate the atmospheric
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pressure experienced at a height of 50 metres over the same place.
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Score : 2, Time : 3 Minutes
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Scoring Indicators
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
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• Atmospheric pressure 1013.2 mb
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• Atmospheric pressure at 50 m height = 1013.2 − (1 mb × 5)
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
8901234512345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345
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= 1008.2 mb
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 Social Science - II - X

9. Learning Outcome
• Illustrates global pressure belts
The equatorial low pressure region was a nightmare for the ancient mariners.
Why?
Score : 2, Time : 3 Minutes
Scoring Indicators
• In ancient times the ocean voyages were in yachts by making use of winds.
• The winds are feeble in the equatorial low pressure region because of massive
rising up of air.
• This region is also known as Doldrum.
• The voyage across this region in yachts was difficult due to the lack of winds.
10. Learning Outcome
• Explains that the atmospheric pressure is not uniform everywhere.

a
al
er
K
T
R
E
C
S

(a) Name the smooth lines in the diagram.

(b) Among the places A and B, identify the place experiencing high pressure and the place
experiencing low pressure.
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(c) The sun is in which hemisphere during the period?
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Score : 2, Time : 4 Minutes
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Scoring Indicators
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1. Isobars
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2. A- Low pressure, B- High pressure
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3. Northern hemisphere
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92
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 Question Pool

11. Learning Outcome

• Explains that the atmospheric pressure is not uniform everywhere.
Is the atmospheric pressure the same at all places given below? Write a note
based on the factors influencing the atmospheric pressure.
• Polar region
• Central pacific region
• Ooty
Score : 4, Time : Minutes
Scoring Indicators
• Polar region - Low temperature, high pressure
• Central pacific region - high temperature, low pressure
• Ooty - low temperature, high pressure
12. Learning Outcome

a
• Illustrates global pressure belts. al
Following are a few facts related to two global pressure belts. Identify the
er
pressure belts.
1. Extends to about 5° to 10° north and south of the equator.
K

2. Located at 30 north and south latitudes on both the hemispheres.

3. Trade winds and Westerlies blows from either side of this belt.
T

4. Known as Doldrum
R

Score : 4, Time : 4 Minutes

E

Scoring Indicators
C

1. Equatorial low pressure belt

S

2. Sub tropical high pressure belt

3. Sub tropical high pressure belt
4. Equatorial low pressure belt
13. Learning Outcome
• Classifies the different types of winds.
Winds are named according to the place from which they blow. Mention any
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two winds named accordingly.
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Score : 2, Time : 2 Minutes
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Scoring Indicators
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• South west monsoon winds
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• North east monsoon winds ( name any suitable winds)
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 Social Science - II - X

14. Learning Outcome

• Describe how the pressure gradient force, Coriolis force and friction influence the
speed and direction of wind.
Illustrated below are the directions of winds in the northern and southern
hemispheres. Identify the figures which are not correct and illustrate them
correctly.

Score : 2, Time : 2 Minutes

Scoring Indicators

a
• Figures – b and d are not correct
al
• Correctly illustrate them.
er
K
T

15. Learning Outcome

R
E

• Classifies the different types of winds.

C

Arrange the items in B and C columns suitable to column A.

S

A B C
Permanent winds Cyclone Mousim
Periodic winds Night Northern plains
Variable winds Westerlies Low pressure over the sea
Local winds Monsoon winds Furious fifties
Land breeze Loo Low pressure centre
Score : 5, Time : 2 Minutes
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Scoring Indicators
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• Permanent winds- Westerlies - Furious fiftees
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• Periodic winds- Monsoon winds - mousim
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• Variable winds - Cyclones - low pressure centre
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• Local winds - Loo - Northern plains
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• Land breeze - night - Low pressure over the sea
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94
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