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Earth - Section 1

16:  

What percentage of insolation is received by the earth's surface?

A.

47%

B.

51%

C.

66%

D.

87%

 
 

Option: B

Explanation :

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17:  

The word used to describe the shape of earth  is

A.

Flat

B.

Circle

C.

Sphere

D.

Oblate Spheroid

 
 

Option: D

Explanation :

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18:  

Which of the following is the cause for the earth's seasons?

A.

Vari,ation in the amount of ene'rgy' given off .by thesun'

B.

Its elliptical orbit and varying speed of rotation

C.

Inclination of its' axis of rotation to the plane of,orbit,

D.

Its greater' distance, from the Sun during winter than during Summer

 
 

Option: C

Explanation :

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19:  

The position of the earth in its orbit, when it is at its greatest distance from the Sun causing summer in the Northern Hemisphere is:

A.

Perihelion

B.

Aphelion

C.

Perigee

D.

Apogee

 
 

Option: B

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20:  

The time required for moonlight to reach earth

A.

3.6 sec

B.

2 sec

C.

1.3 sec

D.

1 sec

 
 

Option: C

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