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Geomorphology - Geography Objective Questions with Answers | Page-23

Questions
111 The characteristics of the Hawaiian type volcano is
A Periodic eruption with a little explosive activity.
B Silent effusion of lava without any explosive activity.
C Silent effusion of lava with some explosive.
D None of the above

Answer: Option [A]

The characteristics of the Hawaiian type volcano is periodic eruption with a little explosive activity. Hawai'ian eruptions are effusive (flowing) rather than explosive because they erupt low-viscosity basaltic lava. Hawai'ian eruptions form shield volcanoes and can also take the form of fissure eruptions. Fissure eruptions occur when lava erupts from long cracks in the ground rather than from a central vent.

112 Tier is
A Cap-shaped structure
B Weathered blocks of rocks in sharp edged shape
C Weathered block of rocks in round edged shape
D Both (B) and (C)

Answer: Option [C]

The correct answer is Weathered block of rocks in round edged shape.

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113 ‘Graben’ is
A A dropped block
B An uplifted block
C A geosyncline
D None of the above

Answer: Option [A]

‘Graben’ is a dropped block. In geology, a graben is a depressed block of the crust of a planet or moon, bordered by parallel normal faults.

114 The distance between the earth and the sun is greatest during
A Aphelion
B Perihelion
C Winter solstice
D Summer solstice

Answer: Option [A]

The distance between the earth and the sun is greatest during Aphelion. The Earth is farthest from the Sun at the Aphelion position. At this point, the Earth is 152 million km away from the Sun.

115 What is the basis of the formation of sedimentary rocks ?
A Formed by the agent of fire
B Formed by the agencies of water, wind, and ice.
C Formed by the agent of pressure.
D Formed by the agencies of heat, water and pressure.

Answer: Option [B]

Sedimentary rocks formed by the agencies of water, wind, and ice. The particle that helps in forming the sedimentary rock is called sediment. This sediment is formed with the help of erosion and weathering from the source area and is then transported to the deposition place by the wind, water, ice and glaciers, which are agents of denudation.

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