geomorphology & earth landforms section 1 MCQ Questions & Answers Detailed Explanation

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The following question based on Geomorphology & Earth landforms topic of indian geography mcq

Questions : Earthquakes are caused by

(a) Earth revolution

(b) Denudation

(c) Earth rotation

(d) Tectonism

The correct answers to the above question in:

Answer: (d)

Earthquakes result from the sudden release of energy in the Earth’s crust that creates seismic waves. Most occur along plate boundaries.

Tectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along a fault plane.

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Question : 1

Which one of the following is an unpredictable natural disaster?

a) Tornado

b) Earthquake

c) Hurricane

d) Cyclone

Answer: (b)

Despite rapid advances in earth sciences and technology, it is hard to predict the exact timing of an earthquake. The suddenness associated with earthquakes is the main reason behind severe damage to life and property.

Due to the general unpredictability of earthquakes, it is best to stress the importance of planning ahead.

Question : 2

Equator represents

a) a belt (ring) around the planet Saturn

b) line joining North and South poles

c) axis of rotation of Earth

d) imaginary line passing round the Earth midway between North & South poles

Answer: (d)

An equator is the intersection of a sphere’s surface with the plane perpendicular to the sphere’s axis of rotation and containing the sphere’s center of mass. Notably, the Equator refers to the Earth’s equator, per above: an imaginary line on the Earth’s surface equidistant from the North Pole and the South Pole, dividing the Earth into the Northern Hemisphere and Southern Hemisphere.

Other planets and spherical astronomical bodies have equators similarly defined. The length of the Equator is roughly 40,075 kilometers.

Question : 3

Extreme slow down-slope motion of soil or rock fragments under gravity because of continual or seasonal agitation of particles is called?

  1. Creep
  2. Earth flow
  3. Saltation
Select the correct answer using the codes given below:

a) 3 only

b) 1 only

c) 2 only

d) 1 and 2

Answer: (b)

Creep is the imperceptibly slow, down slope movement of soil and earth materials.

Question : 4

The Savannas are most widespread in

a) North America

b) Africa

c) South America

d) Asia

Answer: (b)

Question : 5

Magnetic Meridian is a

a) Line joining the geographic north and geographic south of Earth

b) Line parallel to the equator of the Earth

c) Plane passing through the magnetic north and magnetic south of Earth

d) Latitude

Answer: (c)

A magnetic Meridian is a line on the earth’s surface approximating a great circle passing through the north and south magnetic poles.

It can be taken as the horizontal component of magnetic force lines along the surface of the earth. A compass needle is parallel to the magnetic meridian.

Question : 6

Consider the following statements regarding artesian aquifer :

  1. It is a confined aquifer containing groundwater under negative pressure.
  2. It is a geologic layer of porous, but impermeable material such as sand and gravel, limestone or sandstone.
  3. The Great Artesian basin is the largest and deepest artesian basin in the world.
Which of the statements given above is/are correct?

a) 3 only

b) 1 only

c) 1, 2 and 3

d) 2 only

Answer: (c)

An Artesian aquifer is a confined aquifer containing groundwater under positive pressure. This causes the water level in a well to rise to a point, where hydro-static equilibrium has been reached. This type of well is called an Artesian well.

Water may even reach the ground surface if the natural pressure is high enough, in which case the well is called a flowing Artesian well.

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