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Atmospheric Circulation and Weather Systems Class 11 MCQs Questions with Answers
I. Choose the correct answer
Question 1.
Name the instrument used to measured the pressure
(a) thermometer
(b) barometer
(c) electrometer
(d) photometer
Answer
Answer: (b) barometer.
Question 2.
The units of pressure is
(a) mm.
(b) mb. (millibar)
(c) mg.
(d) none of these
Answer
Answer: (b) mb. (millibar).
Question 3.
How many types of pressure systems are found in nature?
(a) two
(A) three
(c) four
(d) five
Answer
Answer: (a) two.
Question 4.
Which one is the type of planetary wind?
(a) trade winds
(b) westerlies
(c) polar winds
(d) all of these
Answer
Answer: (d) all of these.
Question 5.
How many types of pressure belts are there?
(a) 7
(b) 2
(c) 8
(d) 3
Answer
Answer: (a) 7.
Question 6.
Name the hot winds which blow in USA
(a) Chinook
(b) Foehn
(c) Mistral
(d) Loo
Answer
Answer: (a) Chinook.
Question 7.
Name the hot winds which blow in Alps :
(a) Foehn
(b) Chinook
(c) Mistral
(d) Loo
Answer
Answer: (a) Foehn
Question 8.
Name the cold wind which blows from high mountains to the Mediterranean coast of France :
(a) Mistral
(b) Katabatic
(c) Santa Anas
(d) Chinook
Answer
Answer: (a) Mistral.
Question 9.
Name the hot winds which blow in North India in summer
(a) Foehn
(b) Katabatic
(c) Loo
(d) Chinook
Answer
Answer: (c) Loo.
Question 10.
The standard sea level pressure in millibars is
(a) 101.32 mb
(b) 1013.25 mb
(c) 1000 mb
(d) 10130.25 mb
Answer
Answer: (b) 1013.25 mb.
Question 11.
Name the force which deflects the winds from their path due to rotation of earth
(a) gravity
(b) pressure gradient
(c) coriolis
(d) none of these
Answer
Answer: (c) coriolis.
Question 12.
Which one is broad types of cyclone?
(a) temperate
(b) tropical cyclones
(c) both of them
(d) none of them
Answer
Answer: (c) both of them.
Question 13.
An imaginary line drawn through the places which have equal atmospheric pressure reduced to sea level are known as
(a) isobars
(b) isotherms
(c) isotopes
(d) millibars
Answer
Answer: (a) isobars.
Question 14.
The large body of air whose physical properties and moisture is relatively uniform is known as
(a) atmospheric pressure
(b) air mass
(c) pressure gradient
(d) none of these
Answer
Answer: (b) Air mass.
Question 15.
Name the breeze which blows during night when the air at upper slope becomes dense
(a) mountain breezes
(b) valley breezes
(e) sea breeze
(d) land breezes
Answer
Answer: (a) mountain breezes.
Question 16.
In which direction the earth rotates on its axis?
(a) west to east
(b) east to west
(c) north to south
(d) south to north
Answer
Answer: (a) west to east.
Question 17.
Name the tropical cyclone in West India
(a) willy-willies
(b) typhoons
(c) hurricanes
(d) none of these
Answer
Answer: (c) hurricanes.
Question 18.
Name the tropical cyclones in China
(a) typhoons
(b) hurricanes
(c) willy-willies
(d) fehan
Answer
Answer: (a) typhoons.
Question 19.
On the basis of their average height, how many types of clouds are found?
(a) three
(b) six
(c) two
(d) four
Answer
Answer: (a) three.
Question 20.
Name the fibrous clouds with a delicate silky appearance :
(a) cirrus
(b) cirrostratus
(c) cirrocumulus
(d) altostratus
Answer
Answer: (a) cirrus.
Question 21.
Name the clouds which appear as small white flakes or small globular masses without shadow
(a) cirrocumulus
(b) cirrus
(c) cirrostratus
(d) none of these
Answer
Answer: (a) cirrocumulus.
Question 22.
Name the clouds formed at a height of less than 2 km.
(a) altocumulus
(b) low clouds
(c) stratus
(d) cumulus
Answer
Answer: (b) low clouds.
Question 23.
Name the low uniform layers of clouds :
(a) stratus
(b) cumulus
(c) altocumulus
(d) nimbostratus
Answer
Answer: (a) stratus.
Question 24.
The instrument by which the direction of wind is known as
(a) anemometer
(b) wind vane
(c) barometer
(d) none of these
Answer
Answer: (b) wind vane.
Question 25.
Name the periodic wind.
(a) westerlies
(b) easterlies
(c) monsoon
(d) chinook
Answer
Answer: (c) monsoon.
II. Fill up the blanks with suitable words
Question 1.
Air expands when heated and gets ……………. when cooled.
Answer
Answer: compressed
Question 2.
Air pressure is measured with the help of …………….
Answer
Answer: barometer
Question 3.
There are ……………. types of pressure systems.
Answer
Answer: five
Question 4.
Along 30°N and 30°S are found the high pressure areas known as ………………. highs.
Answer
Answer: subtropical
Question 5.
The rotation of earth about its axis affects the ……………….. This force is called ………………
Answer
Answer: direction of wind, coriolis force
Question 6.
………………. force is perpendicular to the isobars.
Answer
Answer: Pressure gradient
Question 7.
The wind circulation around a low is called …………………
Answer
Answer: cyclonic circulation.
Question 8.
The combined phenomenon of southern oscillation and EI-Nino is known as ………………..
Answer
Answer: ENSO.
Question 9.
The cool air, off the high plateaus and ice fields draining into the valley is called ……………..
Answer
Answer: Katabatic
Question 10.
The air masses are classified according to the ……………
Answer
Answer: source region
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