atmosphere & climatology section 3 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 6 [UP UDA/LDA (Pre) 2010]

‘Foehn’ is a local wind of

a) Korea

b) China

c) Switzerland

d) Japan

Answer: (c)

Question : 7 [SSC CGL Pre 1999]

The deflection of the winds to the right in the northern hemisphere is caused by :

a) rotation of the earth

b) revolution of the earth

c) All the above

d) uneven heating of the earth

Answer: (a)

If the Earth didn’t rotate, winds would travel either north or south due to differences in temperature and pressure at different latitudes. But since the Earth does rotate, the Coriolis force deflects these winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

The Coriolis Effect is caused by the rotation of the Earth and the inertia of the mass experiencing the effect. Because the Earth completes only one rotation per day, the Coriolis force is quite small, and its effects generally become noticeable only for motions occurring over large distances and long periods of time, such as largescale movement of air in the atmosphere or water in the ocean.

Such motions are constrained by the surface of the earth, so only the horizontal component of the Coriolis force is generally important. This force causes moving objects on the surface of the Earth to be deflected in a clockwise sense (with respect to the direction of travel) in the northern hemisphere, and in an anti-clockwise sense in the southern hemisphere.

Question : 8

The layer of the atmosphere which contains dust particles and water vapour is called

a) Troposphere

b) Stratosphere

c) Mesosphere

d) Ionosphere

Answer: (a)

Question : 9

Which one of the following is produced by rain water action?

a) Cliff

b) Gorge

c) Dome

d) Gully

Answer: (d)

Question : 10

Consider the following statements:

  1. In tropical grassland regions, rainfall mainly occurs in the short summer season with a long dry season.
  2. In the Mediterranean region, the winter rainfall is caused by the passage of cyclones in the westerly wind belt which lies over this area.
Which of the statements given above is/are correct?

a) 2 only

b) 1 only

c) Neither 1 nor 2

d) Both 1 and 2

Answer: (d)

Tropical grassland located mainly in the continental areas of tropical latitudes where rains fall during the summer season which lasts for about five months. In Mediterranean region, the winter rainfall due to middle latitude fronts and cyclones.

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