EARTH MCQS SET 22

EARTH MCQS SET 22

1. Which of the following is the best definition of 'Tides' ?
(a) A powerful movement of the ocean which proceed constantly in a definite direction
(b) A great circulatory movement of sea water caused by difference in density of sea water
(c) A periodic rise and fall of sea water caused by the gravitational force of moon and sun
on earth
(d) A wind and pressure system having a low pressure in centre and circular wind motion
Ans: (c)

2. Which of the following statements regarding the earth's axis are true?
1. It makes an angle of with the plane of ecliptic
2. It maintains a flexible orientation with respect to the stars
3. It is the most important fact connected with Earth-Sun relationship
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Ans: (c)

3. The heavier silicates named 'Sima’ or silica + magnesium are most abundant in the:
(a) crust
(b) core
(c) mantle
(d) ocean floors
Ans: (a)

4. Insolation heats up the land masses more quickly than the water bodies because:
(a) water is liquid
(b) landmasses are solid
(c) water needs more energy to get warm
(d) rocks are bad conductors of heat
Ans: (c)

5. The earth's annual circuit round the sun covers a distance of:
(a) 1,096 million kms
(b) 1,036 million kms
(c) 966 million kms
(d) 896 million kms
Ans: (c)
6. It is six months long day in the northern polar region and six months long night in the southern polar region because:
(a) earth is revolving around the sun
(b) earth is inclined towards its orbital plane
(c) earth is rotating
(d) none of these
Ans: (b)
7. The surface of Earth that lies between the Tropic of Cancer and the Tropic of Capricorn is called:
(a) North Temperate Zone
(b) Frigid Zone
(c) South Temperate Zone
(d) Torrid Zone
Ans: (d)

8. Which of the following are true regarding equinoxes?
1. They occur on March 21 st and September 23rd
2. They depict equal days and equal. nights on March 21 st and September 23rd on all places of the earth
3. All places on the earth have equal temperature during equinoxes
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Ans: (a)

9. Choose the incorrect statement;
(a) All meridians are of the same length
(b) The axis of the earth is inclined at an angle of to the horizontal
(c) The Sun's rays are vertical at all places on the days of the equinoxes
(d) The summer solstice for the Southern Hemisphere is in December
Ans: (c)

10. The largest amount 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 and ice covered areas of the earth
(d) all the above reflect nearly the same amount
Ans: (a)