Class 9 Social Science: Chapter 2

by

Class 9 Social Science: Chapter 2

  1. Who proposed the theory of Plate Tectonics?

A) Alfred Wegener

B) W.J. Morgan

C) Arthur Holmes

D) Harry Hess

Answer: B) W.J. Morgan.

  1. The crust and the upper part of the mantle together form which layer of the Earth?

A) Asthenosphere

B) Core

C) Lithosphere

D) Mesosphere

Answer: C) Lithosphere.

  1. Which semi-molten layer lies beneath the lithosphere and allows tectonic plates to move?

A) Inner Core

B) Asthenosphere

C) Outer Core

D) Continental Crust

Answer: B) Asthenosphere.

  1. What type of plate boundary forms fold mountains like the Himalaya?

A) Divergent boundary

B) Transform boundary

C) Convergent boundary

D) Destructive boundary

Answer: C) Convergent boundary.

  1. The Mid-Atlantic Ridge is a feature formed by which type of plate movement?

A) Plates moving towards each other

B) Plates moving away from each other

C) Plates sliding past each other

D) Plates sinking beneath one another

Answer: B) Plates moving away from each other.

  1. Most earthquakes and volcanoes occur along a specific area around the Pacific Ocean known as the:

A) Pacific Belt

B) Ring of Fire

C) Volcanic Circle

D) Tectonic Ring

Answer: B) Ring of Fire.

  1. In ancient India, which scholar dedicated a section to earthquakes in the Bṛihatsaṁhitā?

A) Aryabhata

B) Kauṭilya

C) Varāhamihira

D) Brahmagupta

Answer: C) Varāhamihira.

  1. Where is India’s only mud volcano located?

A) Lakshadweep

B) Majuli Island

C) Baratang Island

D) Kutch

Answer: C) Baratang Island.

  1. The process through which rocks on the Earth’s surface break down into smaller pieces without moving the material is known as:

A) Erosion

B) Weathering

C) Deposition

D) Gradation

Answer: B) Weathering.

  1. When plant roots grow into cracks of rocks and split them apart, it is an example of:

A) Physical weathering

B) Chemical weathering

C) Biological weathering

D) Erosion

Answer: C) Biological weathering.

  1. Which process involves the wearing away and movement of soil and rocks from one place to another by natural agents?

A) Erosion

B) Physical weathering

C) Faulting

D) Chemical weathering

Answer: A) Erosion.

  1. The Zabo system, an integrated farming approach using earthen bunds on hillslopes for soil and water conservation, is found in:

A) Meghalaya

B) Nagaland

C) Assam

D) Arunachal Pradesh

Answer: B) Nagaland.

  1. Which of the following landforms is typically formed in the upper course of a river?

A) Meander

B) Delta

C) Oxbow lake

D) Waterfall

Answer: D) Waterfall.

  1. A winding curve or bend in the middle or lower course of a river is called a:

A) V-shaped valley

B) Meander

C) Levee

D) Delta

Answer: B) Meander.

  1. A fan-shaped or triangular area of land formed by the deposition of sediments at the mouth of a river is called a:

A) Estuary

B) Delta

C) Meander

D) Oxbow lake

Answer: B) Delta.

  1. Which coastal landform is created when caves on opposite sides of a headland meet and erode through?

A) Sea cliff

B) Sea stack

C) Sea arch

D) Wave-cut platform

Answer: C) Sea arch.

  1. Bowl-shaped depressions at the head of a glacier are known as:

A) U-shaped valleys

B) Cirques

C) Aretes

D) Fjords

Answer: B) Cirques.

  1. Landforms created by the deposition of rocks, soil, and debris carried and left behind by glaciers are called:

A) Moraines

B) Dunes

C) Yardangs

D) Stacks

Answer: A) Moraines.

  1. Streamlined rock ridges carved by wind in desert regions are known as:

A) Ventifacts

B) Yardangs

C) Deflation hollows

D) Barchans

Answer: B) Yardangs.

  1. Crescent-shaped sand dunes that form in areas with limited sand and a single wind direction are called:

A) Longitudinal dunes

B) Star dunes

C) Parabolic dunes

D) Barchan dunes

Answer: D) Barchan dunes.

  1. Icicle-shaped formations hanging from the ceiling of limestone caves are called:

A) Stalagmites

B) Sinkholes

C) Stalactites

D) Dolines

Answer: C) Stalactites.

  1. Unique landforms created by underground water through chemical weathering and erosion in limestone areas are collectively called:

A) Karst topography

B) Glacial topography

C) Arid topography

D) Coastal topography

Answer: A) Karst topography.

  1. Which of the following human activities heavily contributes to the triggering of landslides?

A) Afforestation

B) Deforestation

C) Contour farming

D) Terracing

Answer: B) Deforestation.

  1. A sudden instability of snow on steep mountain slopes causing it to slide down rapidly is known as an:

A) Earthflow

B) GLOF

C) Avalanche

D) Dust storm

Answer: C) Avalanche.

  1. What does the acronym GLOF stand for in the context of mountain disasters?

A) Glacial Lake Outburst Flood

B) Global Lake Overflow Flow

C) Glacial Landslide Outburst Flood

D) Geological Lake Outburst Flow

Answer: A) Glacial Lake Outburst Flood.

error: Content is protected !!