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1. Why do we have a leap year every four years?

a) The Earth gets shifted out of orbit every four years

b) The revolution slows down a little once every four years

c) The length of the year is not an integer number of days

d) It is a convention

Ans:    C

2. Variation in duration of day and night is due to 

1. Rotation of earth on its axis

2. Revolution of the earth around the sun

3. The inclination of the earth at an angle of 66 (1/2)°

a) 1 and 2

b) 2 and 3

c) 1 and 3

d) 1, 2 and 3

Ans:     B

3. The brightest planet is:

a) Jupiter

b) Mars

c) Venus

d) Mercury

Ans:     C

4. What is meant by the term “Midnight sun”?

a) Twilight

b) Rising Sun

c) Very bright moon

d) Sun shining in the polar circle for a long time

Ans:     D

5. The earth rotating around its axis from-

a) North to south

b) East to west

c) South to north

d) West to east

Ans:     D

6. The inclination of the earth’s axis to the orbital plane is-  

a) 21 (½)°

b) 23 (1⁄2)°

c) 66 (1⁄2)°

d) 90°

Ans:     C

7. Match the following-

Date                                 Conditions in Northern Hemisphere

a) March 21st                   Winter Solstice  

b) June 21st                      West to east

c) September 21st            Summer Solstice

d) December 22nd            Vernal Equinox

    A B C D

a) 1 2 3 4

b) 1 3 4 2

c) 2 3 1 4

d) 4 3 2 1

Ans:      D