11. Trade winds of the northern hemisphere blow from the north-east to south-west due to:
(a) Coriolis force-
(b) Gravitational force
(c) Centripetal force
(d) None of these
12. Which country is known as Thunderbolt of Asia?
(a) Bhutan-
(b) Mongolia
(c) China
(d) None of the above
13. One of the country through which equator passes is?
(a) Malaysia-
(b) China
(c) Malta
(d) Pakistan
14. The depletion of ozone layer has been caused mainly by .
(a) the deforestation of large area of land
(b) the release of chlorofluoro carbons into the atmosphere-
(c) changes in asteroid activity in the solar system
(d) the release of Industrial waste
15. Which layer of atmosphere provides ideal conditions for flying aeroplanes?
(a) Troposphere-
(b) Stratosphere
(c) Ionosphere
(d) Exosphere
16. Through which one of the following countries the equator does not pass?
(a) Tanzania-
(b) Kenya
(c) Zaire
(d) Uganda
17. A line on a map joining places of equal monthly or yearly rainfall is called .
(a) Isobar
(b) Isohyet-
(c) Isotherm
(d) Isoneph
18. The Earth revolves around the Sun in an elliptical orbit. Its speed .
(a) Is greatest when it is farthest from the Sun
(b) Is greatest when it is closest to the Sun-
(c) Remains the same at all points on the orbit
(d) Goes on decreasing continuously
19. The origin of earth dates back to approximately .
(a) 3.6 billion years
(b) 4.6 billion years-
(c) 5.6 billion years
(d) 6.6 billion years
20. The term ‘Ecliptic’ is used for the —.
(a) Sun when eclipsed
(b) Moon when eclipsed
(c) Sun s path in the sky during a year-
(d) Path of Earth around the Sun
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