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Suppose 100 units of radiation is coming from the sun. 35 units gets reflected back to space. 14 units is absorbed by atmosphere. 51 units reaches the earth’s surface. What is the amount of insolation in the above scenario ?

49 units
51 units
65 units
86 units
Explanation:
The purpose of this question was to make you relearn that – only that part of the sun’s radiation which reaches the earth’s surface is called insolation. While it may look easy to remember it now, students often gets confused in these basic concepts when they read more advanced things.
Additional Questions

Tropical cyclones do not form over equator. This is because
1. Equator is a zone of wind convergence.
2. The temperature over equator is too high.
3. There are no fronts over equator.
Select the correct answer using the codes given below.

Answer

With reference to laterite soil, consider the following statements:
1. They are the result of intense leaching.
2. They are poor in organic matter.
Which of the statements given above is/are correct?

Answer

Monsoon in India is said to be essentially pulsating in nature. This means

Answer

Deltas of eastern India are shrinking due to
1. huge amount of sediments being deposited.
2. groundwater mining.
3. construction of large dams.
Select the correct answer using the codes given below.

Answer

With reference to International Date Line (IDL), consider the following statements:
1. A traveler crossing the IDL from east to west gains a day.
2. IDL is an imaginary straight line at 180 degree meridian.
Which of the statements given above is/are correct?

Answer

Which of the following is/are examples of mountains of elevation?
1. Rockies
2. Himalayas
3. Andes
4. Alps
Select the correct answer using the codes given below.

Answer

The lava cone of a volcano is having steep sloping sides. Which of these can be said about the volcano?
1. the lava must have been highly fluid.
2. it must have high silica content.
3. the volcano must have been explosive.
Select the correct answer using the codes given below.

Answer

Which of the following is/are examples of chemical weathering?
1. frost action on rocks.
2. repeated wetting and drying.
3. oxidation of minerals in a rock
Select the correct answer using the codes given below.

Answer

Which of the following comes under the phenomena of mass movement?
1. soil creep
2. weathering
3. landslide
Select the correct answer using the codes given below.

Answer

The rivers in India that flows through a rift valley are
1. Luni
2. Damodar
3. Tapi
4. Betwa
Select the correct answer using the codes given below.

Answer
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