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Winds · Maharashtra Board STD 7 (MSBSHSE - English Medium). 25 questions.

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25 questions · timed · auto-graded

Question 11 Mark
Try this:

Can a bottle filled with water be moved to the other end of the table in this manner? Can we use the same method that you tried for moving paper rolls?

Answer
A bottle filled with water cannot be moved to the other end of the table in this manner. We cannot use the same methods that we tried for moving paper rolls to move a bottle filled with water as it is heavier in weight, (we can if we tilt the table which was an option.)
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Question 21 Mark
Try this: What can we do to move the rolls to the other end of the table with a greater speed?
Answer
We mostly use the technique/object which will blow air with maximum force to move the rolls to the other end of the table with a greater speed.
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Question 31 Mark
Try this:

What could be the reason of the delay in making the rolls reach to the other end of the table?

Answer
There will be a delay in making the rolls reach the other end of the table if the air is blown with lesser force.
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Question 41 Mark
Try this: See who moves the paper roll first to the other end of the table:
Answer
The object which blows the air with maximum force, moves the paper roll first to the other end of the table.
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Question 51 Mark
Try this: Without touching the roll of the paper on the table, what can be done to move the paper rolls to the other end of the table?
Answer
To move the paper rolls to the other end of the table without touching a person can
  • Blow the air from his mouth towards the roll of paper
  • Use a newspaper a book or a hand fan
  • Tilt the table towards the other end.
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Question 61 Mark
Find out the odd man out and give reason for your answer: Furious Fifties, Screaming Seventies, Screeching Sixties,, Roaring Forties.
Answer
Screaming Seventies – Others are names of winds in the southern hemisphere.
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Question 71 Mark
Find out the odd man out and give reason for your answer: India, Japan, China, Phillippines.
Answer
India – Others experience typhoons.
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Question 81 Mark
Find out the odd man out and give reason for your answer: Southeast Asia, West Europe, East Africa, North Australia.
Answer
West Europe – Others receive monsoon rains.
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Question 91 Mark
Find out the odd man out and give reason for your answer: Mistral, Bora, Chinook, Foehn
Answer
Chinook – Others originate in the Alps Mountain.
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Question 101 Mark
Find out the odd man out and give reason for your answer: Loo, Foehn, Mistral, Simoon
Answer
Mistral – Others are hot and dry winds.
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Question 111 Mark
Find out the odd man out and give reason for your answer: Mistral, Bora, Pampero, Foehn
Answer
Foehn – Others are cold and dry winds.
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Question 121 Mark
Find out the odd man out and give reason for your answer: Landbreeze, Valley winds, Westerlies, Mountain winds.
Answer
Westerlies – Others are names of local winds.
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Question 131 Mark
Find out the odd man out and give reason for your answer: Polar winds, Local winds, Easterlies, Westerlies
Answer
Local winds – Others are names of planetary winds.
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Question 141 Mark
Define the following terms: Hurricanes:
Answer
The cyclones in the Caribbean sea which are destructive in nature are called Hurricanes.
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Question 151 Mark
Define the following terms: Typhoons:
Answer
Storms arising in the months between June and October in the western part of the Pacific Ocean which blow with high velocity winds and heavy rains causing destruction are called Typhoons.
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Question 161 Mark
Define the following terms: Horse Latitudes:
Answer
In the area near the Tropic of Cancer and Tropic of Capricorn, that is between 25° and 35° north and south, there exist a high pressure belt, which is a calm belt. This belt is called as the Horse latitudes.
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Question 171 Mark
Define the following terms: Doldrums:
Answer
The region up to 5° North and 5° South of the equator remains calm for most of the year and winds do not blow in this region. It is called the equatorial calm zone or Doldrums.
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Question 181 Mark
Define the following terms: Local Winds:
Answer
The winds that blow for a short duration of time, originate in specific region and blow over a limited area are called Local Winds.
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Question 191 Mark
Define the following terms: Screeching Sixties:
Answer
The stormy winds around 60°S make tremendous noise and hence they are called the Screeching Sixties.
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Question 201 Mark
Define the following terms: Furious Fifties:
Answer
Around 50°S winds are stormy hence they are called the Furious Fifties.
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Question 211 Mark
Define the following terms: Roaring Forties:
Answer
Beyond 40°S winds blow with tremendous velocity. These winds are called the Roaring Forties.
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Question 221 Mark
State the reasons that lead to the formation of cyclones and describe the effects of cyclones.
Answer
(i) Cyclonic conditions are created when a low pressure area is surrounded by high pressure areas.
(ii) In these conditions, winds start blowing towards the low pressure area from the surrounding high pressure areas.
(iii) The effects of cyclone are as follows.
  • The sky is cloudy
  • Winds blow with a very high velocity
  • It rains heavily
  • It may cause loss of life and property in coastal regions.
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Question 231 Mark
Why do the cyclonic winds blow in a circular manner?
Answer
(i) Cyclones are created when a low pressure area is surrounded by high pressure areas. In these conditions, winds start blowing towards the low pressure area from the surrounding high pressure areas.

(ii) But due to the rotation of the earth in the northern hemisphere the winds deflected towards the right of their original direction whereas in the southern hemisphere they get deflected towards the left of their original direction which causes the cyclone winds to blow in a circular manner.

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Question 241 Mark
What effect does the rotation of the earth have on the wind?
Answer
  • The direction of the winds is influenced by the rotation of the earth.
  • In the northern hemisphere, winds get deflected towards the right of their original direction, whereas in the southern hemisphere they get deflected toward the left of their original direction.
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Question 251 Mark
Why is the air pressure high in polar areas in both the hemispheres?
Answer
  • In both the polar areas the temperature here is below 0°C.
  • Hence the air is cold & heavy.
  • Hence the air pressure is high in the polar areas in both the hemispheres.
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