| 2. Interior of Earth |
1. Which one among the following is NOT a minor plate?
(a) Nazca
(b) Arabia
(c) Philippines
(d) Antarctica
Ans:- (d)
2. Lithosphere consists of-
(a) Upper and Lower mantle
(b) Crust and core
(c) Crust and uppermost solid mantle
(d) Mantle and core
Ans:- (c)
3. Which of the following elements are found in highest and lowest quantities respectively in the crust of the earth?
(a) Oxygen & silicon
(b) Calcium & sodium
(c) Sodium & magnesium
(d) Oxygen & magnesium
Ans:- (d)
4. The most abundant element is:
(a) Silicon
(b) Calcium
(c) Nitrogen
(d) Oxygen
Ans:- (d)
5. identify the element that is most prolific in the crust of the earth.
(a) Hydrogen
(b) Silicon
(c) Oxygen
(d) Iron
Ans:- (c)
6. Which of the following is the outer layer of the Earth that is made of plates which fit together like a jigsaw puzzle?
(a) Lithosphere
(b) Asthenosphere
(c) Mesosphere
(d) Biosphere
Ans:- (a)
7. Which of the following is NOT a primary force which influences ocean currents?
(a) Magnetic fields of the earth
(b) Heating by the sun
(c) Gravity
(d) Coriolis force
Ans:- (a)
8. What is the average density of the earth?
(a) 0.49g cm-3
(b) 3.3 g cm-3
(c) 1/1 g cm-3
(d) 5.517 g cm-3
Ans:- (d)
9. Which is the most abundant mineral in the Earth's continental crust?
(a) Pyroxenes
(b) Quartz
(c) Feldspar
(d) Micas
Ans:- (c)
10. The Earth's axis of rotation (polar axis) is always inclined at an angle of-
(a) 23.0° from the elliptic axis
(b) 23.1° from the elliptic axis
(c) 24.5° from the elliptic axis
(d) 23.5° from the elliptic axis
Ans:- (d)
11. Quartz composed of which two elements-
(a) Iron and magnesium
(b) Iron and oxygen
(c) Oxygen and silicon
(d) Silicon and iron
Ans:- (c)
12. The most abundant metal in the earth's crust is-
(a) Calcium
(b) Aluminium
(c) Iron
(d) Magnesium
Ans:- (b)
13. Which one of the following is not a minor plate?
(a) Cocos Plate
(b) Nazca Plate
(c) Caroline Plate
(d) Antarctic Plate
Ans:- (d)
14. Which of the following is the most abundant metal on Earth's crust?
(a) Magnesium
(b) Aluminium
(c) Copper
(d) Iron
Ans:- (b)
15. Epirogenetic movement give rise to-
(a) Shields
(b) Plains
(c) Volcano
(d) Fold mountain
Ans:- (d)
16. Where is the Coriolis Effect the largest?
(a) At the Equator
(b) At the Tropic of Capricorn and Tropic of Cancer
(c) At 45 degree latitude in each hemisphere
(d) At the North Pole
Ans:- (d)
17. What is the correct sequence of layers of Earth from the outside of the planet to the inside?
(a) Crust (outermost)-core-mantle (innermost)
(b) Core (outermost)-mantle-Crust (innermost)
(c) Mantle (outermost)-core-crust (innermost)
(d) Crust (outermost)-mantle-core (innermost)
Ans:- (d)
18. Which of the following is the largest crustal plate on Earth with an area of over 103,000,000 km2?
(a) South American plate
(b) African plate
(c) Eurasian plate
(d) Pacific plate
Ans:- (d)
19. Which one of the following statements regarding S-waves is not correct?
(a) S-waves are slower than P-waves
(b) During an earthquake S-waves are less destructive to structures like buildings and highway overpasses
(c) S-waves can travel only through solids and cannot travel through the Earth's outer core
(d) Seismologists have concluded that the Earth's outer core must be liquid or fluid
Ans:- (b)
20. What are the main mineral constituents of crust on the continental masses?
(a) Silica and Magnesium
(b) Magnesium and Alumina
(c) Silica and Alumina
(d) Nickel and Iron
Ans:- (c)
21. What does the term 'Lithosphere' refer to?
(a) Interior of the Earth
(b) Crust of the Earth
(c) Plants and animals
(d) None of the above
Ans:- (b)
22. In the structure of planet Earth, below the mantle, the core is mainly made up of which one of the following?
(a) Aluminium
(b) Chromium
(c) Iron
(d) Silicon
Ans:- (c)
23. In the interior of the Earth-
(a) The temperature falls with increasing depth
(b) The pressure falls with increasing depth
(c) The temperature rises with increasing depth
(d) Both temperature and pressure fall with increasing depth
Ans:- (c)
24. The maximum depth of Lithosphere is found in the-
(a) Pacific Ocean
(b) Siberian Plain
(c) Patagonian Desert
(d) Himalayan Mountains
Ans:- (a)
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