geomorphology & earth landforms section 2 MCQ Questions & Answers Detailed Explanation

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

Questions : Which of the following statements is correct ?

(a) Magma has gas while lava has no gas

(b) Lava and magma both have gas

(c) Lava has gas while magma has no gas

(d) Neither the lava nor the magma has gas

The correct answers to the above question in:

Answer: (b)

Highly viscous lava tends to entrap gas, which forms vesicles (bubbles) within the rock as they rise to the surface. Lava with low viscosity tends to easily release bubbling gases as they are formed.

Lavas also may contain many other components, sometimes including solid crystals of various minerals, fragments of exotic rocks known as xenoliths and fragments of previously solidified lava. Volcanic eruptions are caused by magma (a mixture of liquid rock, crystals, and dissolved gas) expelled onto the Earth’s surface.

At depth in the Earth, nearly all magmas contain gas dissolved in the liquid, but the gas forms a separate vapour phase when pressure is decreased as magma rises toward the surface of the Earth. This is similar to carbonated beverages which are bottled at high pressure. The high pressure keeps the gas in the solution in the liquid. Gas gives magmas their explosive character because the volume of gas expands as pressure is reduced.

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Read more geomorphology earth landforms Based Indian Geography Questions and Answers

Question : 1

Which one of the following types of erosion is responsible for the formation of Chambal Ravines ?

a) Rill

b) Splash

c) Gully

d) Sheet

Answer: (c)

Chambal ravine formation significantly increases soil loss from agricultural lands and severely impacts agricultural productivity. A review of ephemeral gully erosion and spreading rates of the ravenous tracks of Lower Chambal Valley using geospatial tools shows that both the ravenous and the marginal lands have increased during the last 15 years.

Question : 2

The latitude of a place is expressed by its angular distance in relation to—

a) Axis of the Earth

b) Equator

c) North Pole

d) South Pole

Answer: (b)

Latitude is a geographic coordinate that specifies the north-south position of a point on the Earth's surface.

The lines of constant latitude, or parallels, run east–west as circles parallel to the equator. Latitude is an angle (defined below) which ranges from 0° at the Equator to 90° (North or South) at the poles.

Question : 3

The Tropic of Cancer does not pass through

a) Bangladesh

b) Myanmar

c) China

d) Nepal

Answer: (d)

The Tropic of Cancer passes through Algeria, Niger, Libya, Egypt, Saudi Arabia, United Arab Emirates, Oman, India, Bangaladesh, Myanmar, China, Mexico, Bahamas, Mauritinia, Mali etc.

Question : 4

Which of the following are active volcanoes?

  1. Aconcagua
  2. Etna
  3. Kilimanjaro
  4. Vesuvius
Select the correct answer from the code given below.

a) 2 and 3

b) 1 and 2

c) 2 and 4

d) 1 and 3

Answer: (c)

Question : 5

Consider the following statements.

  1. Tropical deserts in the world are found in the trade wind bands of Western ends of Continents.
  2. In India, Eastern Himalayan region receives more rain from North-Eastern winds.
Which among the above statements is/are correct?

a) Both 1 and 2

b) Only 1

c) Neither 1 nor 2

d) Only 2

Answer: (b)

Question : 6

Consider the following statements:

  1. The large supercontinent that existed 200 million years ago when all of the continents were together was called Pangaea.
  2. Mount St. Helen’s a part of the Cascade Range of volcanoes, result from the subduction of the Juan de Fuca plate.
  3. The Andes Mountains of South America are a result of divergent plate boundary.
Select the correct statement/statements using the codes given below:

a) 1, 2 and 3

b) 1 and 2

c) None

d) 2 only

Answer: (b)

The Andes Mountains of South America are a result of a convergent plate boundary, also known as a destructive plate boundary.

It is an actively deforming region where two tectonic plates or fragments of the lithosphere move toward one another and collide.

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