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41.

The sutudy of time in relation to earth's history is called:

A.	Geochronology	B.	Geohistology
C.	Geography	D.	None of these

42.

The distance between the earth and the sun is smallest in the month of:

A.	March	B.	June
C.	July	D.	August

43.

Geostationary orbit is at a height of:

A.	6 km	B.	100 km
C.	3000 km	D.	3600 km

44.

Owing to the equatorial bulge and the polar flattening, the polar radius of the earth falls short of the equatorial radius about:

A.	22 km	B.	36 km
C.	40 km	D.	45 km

45.

Antipodes are:

A.	Places diametrically opposite on earth surface	B.	Lines joining places having a time difference
C.	Lines joining places having the same depth	D.	None of these

46.

The largest amont of reflection of the solar radiant energy which is reflected back into space before reaching the earth's surface is due to:

A.	Clouds	B.	Water bodies
C.	Snow areas	D.	None of these

47.

The earth rotates arojnd the axis pointing towards:

A.	The polar star	B.	The moon
C.	Sun	D.	Venus

48.

Maximum altitude of polar wtar at place 28

A.	3-Jan	B.	2-Jun
C.	10-Mar	D.	15-Aug

49.

The incoming short-wave solar radiation is balanced by an equal amount of long wave radiation from Earth going back to space. This is known as:

A.	Heat balance of earth	B.	Wave balance of Earth
C.	Earth radiation	D.	None of these

50.

The approximate surface temperature on the sunlit side of the earth is:

A.	30	B.	25
C.	17	D.	10