EARTH MCQS SET 23

EARTH MCQS SET 23

1. What percentage of insolation is received by the earth's surface?
(a) 47%
(b) 51%
(c) 66%
(d) 87%
Ans: (a)
2. The incoming short-wave solar radiation is balanced by an equal amount of long-wave radiation from earth going back to space. This is known as:
(a) earth radiation
(b) wave balance of earth
(c) heat balance of earth
(d) radiation exchange
Ans: (c)

3. The latitude of a place expresses its angular position relative to the plane of
(a) axis of the Earth
(b) equator
(c) North pole
(d) South pole
Ans: (b)

4. At 12 noon of December 21, you observe that you cast no shadow as you stand in bright sunlight. So you must be, somewhere near:
(a) the Arctic Circle
(b) the Tropic of Cancer
(c) the Tropic of Capricorn
(d) the South Pole
Ans: (c)

5. The Gutenberg discontinuity is between:
(a) the crust and the mantle
(b) the upper and lower mantles
(c) the outer core and the lower mantle
(d) the inner and outer cores
Ans: (c)

6. If the earth's axis had not been inclined:
1. temperature distribution would have been uniform
2. days and nights would not have occurred
3. seasons would not• have occurred
4. poles would not have continuous day
(a) I, III and IV
(b) II and IV
(c) III and IV
(d) II, III and IV
Ans: (c)

7. The Tropic of Cancer does NOT pass through: [NDA 2003]
(a) Egypt
(b) Mexico
(c) Oman
(d) Yemen
Ans: (d)

8. Which one of the following minerals occurs abundantly in the Earth's crust?
(a) Bauxite
(b) Silica
(c) Manganese
(d) Iron
Ans: (b)

9. The axis of rotation of earth is tilted by 23.5° to the plane of revolution around the sun.
The latitude of Mumbai is less than 23.5° whereas the latitude of Delhi is more than
23.5°. Which one of the following statements in this regard is correct?
(a) The sun can come overhead at both these places
(b) The sun will never come overhead at either of these places
(c) At Mumbai the sun can come overhead, but it will never do so at Delhi
(d) At Delhi the sun can come overhead but it will never do so at Mumbai
Ans: (c)

10. Consider the following statements:
1. Prime Meridian passes through Greenwich and is at 0° Longitude.
2. International Date Line, on the map appears as a straight line along 180° Longitude.
3. While crossing International Date Line from east to west, one gains a day.
4. Tropic of Cancer lies at Latitude.
Which of these statements are correct? [Asstt Comm PF 2002]
(a) 1, 2, 3 and 4
(b) 1, 2 and 4
(c) 1 and 3
(d) 1 and 4
Ans: (d)