(Model Paper) CSIR-UGC NET Exam "Earth Sciences"

CSIR-UGC NET Exam Model Paper

Subject: Earth Sciences

21. Albedo of a surface is defined by the ratio of outgoing to incoming solar radiation. Keeping this in view, which of the following surface will have the highest albedo?

1. Water
2. Sand
3. Snow
4. Forest

22. Geostrophic wind is a balance between the pressure gradient force and the Coriolis force. In non-geostrophic wind, flow will become circulatory because of

1. pressure difference term
2. momentum term
3. temperature difference term
4. shear term

23. In valley-mountain system, cold air is heavier than warm air, and thus flows down hill as a katabatic wind. In the case of an anabatic wind,

1. wind rises vertically in the valley
2. wind forms updraft and downdraft motion
3. wind will flow along the slope
4. wind will have cross mountain flow

24. Cyclones or hurricanes do not develop within about 5 0 N and S of the equator because the

1. pressure gradient is weak
2. trade winds converge
3. ocean surface temperature is high
4. Coriolis force is very weak

25. When statically stable air flown over a hill or ridge, it is set into oscillation. These waves are known as

1. Rossby waves
2. Kelvin waves
3. gravity waves
4. mountain waves

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