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Earth - Section 1

6:  

The heavier silicates named 'Sima' Of silica + magnesium are most abundant in the

A.

Crust

B.

Core

C.

Mantle.

D.

Ocean floors

 
 

Option: D

Explanation :

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7:  

Which of the following are true regarding equinoxes?

1. They occur on Marchh 21st and September 23rd

2. They depict equal days and equals nights on March 2 I st and September 23rd on all places of the earth

3. All places on the earth have equal temperature during equinoxes.

 

A.

I and 2 only

B.

2 and 3 only

C.

I and 30 only

D.

1,2 and 3

 
 

Option: D

Explanation :

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8:  

What is the approximate equatorial circumference of the earth?

A.

30,000 Km

B.

35,000 Km

C.

40,000 Km

D.

45,000 Km

 
 

Option: D

Explanation :

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9:  

Which of the fonowing statements regarding the earth's axis are true?

It makes an angle of 660 with the plane of ecliptic. It maintains a flexible orientation with respect to the stars It is the most important fact connected with Earth Sun relationship
A.

I and 2

B.

2 and 3

C.

1 and 3

D.

1,2 and 3

 
 

Option: C

Explanation :

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10:  

Spring tides  occur on new moon and full moondays because on these days

A.

Sun, moon  and earth  are in the straight line

B.

Sun and earth are at right angles

C.

Sun and Moon are at right angles

D.

·Earth and Moon are at right angles

 
 

Option: A

Explanation :

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