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131.

Seasons occur due to

A.	Earth's revolution around the sun	B.	Earth is round
C.	Earth's Axis (imaginary) is inclined by 66112?	D.	Combined effect of (a) and (b)

132.

Atoll refers to

A.	A narrow strip of land separating two seas	B.	A hill top
C.	A strait joining two-seas	D.	A horse-shoe or ring-shaped coral reef

133.

How many times is the diameter of the sun greater than that of the Earth?

A.	50	B.	49
C.	109	D.	115

134.

The earth's axis as inclined to the plane of its orbit is

A.	66.1/3?	B.	33.1/2?
C.	99.1/2?	D.	30.1/2?

135.

A light year is

A.	A unit of time which the earth takes to go round the sun	B.	The distance travelled by the light in one year
C.	It is a year in which the gravitational pull is less than the normal value of 'G'

136.

The diameter of the earth, on the average, is approximately

A.	8000 metres	B.	8000 miles
C.	10,000 miles	D.	25,000 miles

137.

The earth's circumference is approximately

A.	8,000 metres	B.	5,000 km
C.	20,000 miles	D.	25,000 miles

138.

How much time does light take to reach the earth from the sun

A.	8 seconds	B.	30 seconds
C.	8 minutes	D.	100 seconds

139.

The phenomena of change of seasons and their formation is caused by the earth's

A.	Rotation	B.	Revolution
C.	Gravity	D.	Inclination of the axis of the earth to the plane of the orbit

140.

Days and nights are caused due to the phenomena of the earth's

A.	Gravitational pull	B.	Rotation
C.	Revolution	D.	Proximity of the sun