ROCKS AND MOUNTAINS MCQS SET 02

ROCKS AND MOUNTAINS MCQS SET 02

1. Molten rock below the surface of the earth is called:
(a) Basalt
(b) Laccolith
(c) Lava
(d) Magma
Ans: (d)

2. The Himalayas were formed due to :
(a) internal pressure of two large land forms
(b) faulting of the earth's crust
(c) folding of the earth's crust
(d) folding of the geo-syncline named Tethys
Ans: (d)

3. What is Weathering?
(a) Removal of earth's material by river action
(b) Removal of earth's material by wind action
(c) Breaking up and disintegration of rocks
(d) Hardening up of rocks due to weather conditions
Ans: (c)

4. Which of the following is a chemical weathering process ?
(a) Frost Action
(b) Hydraulic Action
(c) Oxidation
(d) Thermal Expansion
Ans: (c)
5. Which of the following predominantly acts as the agent of chemical erosion of soil?
(a) Glacier
(b) Seawave
(c) Underground water
(d) Wind
Ans: (c)
6. The most ideal conditions for the chemical weathering are found in :
(a) cold and dry regions
(b) cold and humid regions
(c) hot and dry regions
(d) hot and humid regions
Ans: (d)
7. Which of the following represents d process of chemical weathering?
(a) Thermal expansion and contraction
(b) Mass exfoliation
(c) Hydration and Hydrolysis
(d) Frost action and crystal growth
Ans: (c)

8. Soil erosion can be prevented by:
(a) allowing herbivorous animals to graze freely
(b) growing plants on a large scale to form soil cover
(c) making the land sloppy
(d) adding chemicals to increase cohesion
Ans: (b)
9. Formation of pot holes in river beds is an example of:
(a) hydration
(b) erosion
(c) corrosion
(d) attrition
Ans: (c)
10. Exposure of rock to the changes of temperature is the cause of: [IFS 1990]
(a) Biological weathering
(b) Chemical weathering
(c) Degradational weathering
(d) Mechanical weathering
Ans: (d)