Class 9 SST Part 1 Chapter 2 MCQs – Earth's Surface Mock Test

Class 9 Social Science Part 1 Chapter 2 MCQs with answers: chapter-wise multiple choice questions on Earth's Surface, NCERT, CBSE 2026-27.

Welcome to the Class 9 SST Part 1 Chapter 2 Mock Test on the Shaping of the Earth's Surface. This interactive test is designed to help you prepare for your CBSE exams (2026-27) with confidence.

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Question 1

What is the primary source of energy for the Earth's internal forces?

(a) Solar energy
(b) Heat from the Earth's core
(c) Wind energy
(d) Tidal energy

Question 2

Which theory explains the movement of the Earth's crust and the formation of major physical features?

(a) Theory of Evolution
(b) Theory of Relativity
(c) Theory of Plate Tectonics
(d) Theory of Gravitation

Question 3

Who gave the theory of plate tectonics?

(a) Charles Darwin
(b) W.J. Morgan
(c) Isaac Newton
(d) Albert Einstein

Question 4

Which layer of the Earth is the outermost layer on which we live?

(a) Mantle
(b) Core
(c) Crust
(d) Asthenosphere

Question 5

The crust along with the upper part of the mantle forms the:

(a) Asthenosphere
(b) Lithosphere
(c) Biosphere
(d) Atmosphere

Question 6

Which layer beneath the lithosphere is semi-molten and allows the plates to move?

(a) Inner Core
(b) Outer Core
(c) Asthenosphere
(d) Lower Mantle

Question 7

What causes the movement of tectonic plates?

(a) Gravitational pull of the Moon
(b) Convection currents in the mantle
(c) Rotation of the Earth
(d) Solar winds

Question 8

Which type of plate boundary is formed when two plates move towards each other?

(a) Divergent Boundary
(b) Transform Boundary
(c) Convergent Boundary
(d) Lateral Boundary

Question 9

When two continental plates collide, they form:

(a) Rift Valleys
(b) Fold Mountains
(c) Mid-Ocean Ridges
(d) Ocean Trenches

Question 10

The Himalayas are an example of which type of mountain?

(a) Block Mountains
(b) Volcanic Mountains
(c) Fold Mountains
(d) Residual Mountains

Question 11

What happens when an oceanic plate collides with a continental plate?

(a) The continental plate sinks.
(b) Both plates stop moving.
(c) The oceanic plate sinks beneath the continental plate.
(d) A new ocean is formed.

Question 12

Which type of boundary is characterized by plates moving away from each other?

(a) Convergent Boundary
(b) Divergent Boundary
(c) Transform Boundary
(d) Subduction Boundary

Question 13

The Mid-Atlantic Ridge is a good example of a feature formed at a:

(a) Convergent Boundary
(b) Divergent Boundary
(c) Transform Boundary
(d) Fault Line

Question 14

Which boundary involves plates sliding past each other without creating or destroying crust?

(a) Convergent Boundary
(b) Divergent Boundary
(c) Transform Boundary
(d) Destructive Boundary

Question 15

The San Andreas Fault in the United States is an example of a:

(a) Convergent Boundary
(b) Divergent Boundary
(c) Transform Boundary
(d) Subduction Zone

Question 16

Most earthquakes and volcanoes occur along:

(a) Plate centers
(b) Plate boundaries
(c) Ocean trenches
(d) Mid-ocean ridges

Question 17

The area around the Pacific Ocean known for frequent earthquakes and volcanoes is called the:

(a) Pacific Rim
(b) Ring of Fire
(c) Oceanic Belt
(d) Volcanic Circle

Question 18

What is weathering?

(a) The movement of broken rocks.
(b) The breaking down of rocks on the Earth's surface.
(c) The formation of new rocks.
(d) The melting of rocks into magma.

Question 19

Which type of weathering involves rocks breaking into smaller pieces due to temperature changes, frost, or wind?

(a) Chemical Weathering
(b) Biological Weathering
(c) Physical Weathering
(d) Human Weathering

Question 20

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) Mechanical Weathering

Question 21

Which of the following is NOT an agent of erosion?

(a) Wind
(b) Water
(c) Ice
(d) Heat

Question 22

What is the main difference between weathering and erosion?

(a) Weathering involves movement; erosion does not.
(b) Erosion involves movement; weathering does not.
(c) Weathering only happens in cold climates.
(d) Erosion only happens in deserts.

Question 23

Which type of erosion is common in dry and sandy areas?

(a) Water Erosion
(b) Glacial Erosion
(c) Wind Erosion
(d) Coastal Erosion

Question 24

How does deforestation lead to soil erosion?

(a) It increases rainfall.
(b) It removes roots that hold the soil together.
(c) It cools the soil.
(d) It adds more nutrients to the soil.

Question 25

Which of the following is a method to prevent soil erosion on hilly slopes?

(a) Deforestation
(b) Overgrazing
(c) Terracing
(d) Urbanization

Question 26

The landform where a river flows over a steep cliff or vertical drop is called a:

(a) Meander
(b) Delta
(c) Waterfall
(d) Oxbow Lake

Question 27

In which course of a river do waterfalls generally form?

(a) Upper Course
(b) Middle Course
(c) Lower Course
(d) Mouth

Question 28

A winding curve or bend in a river is known as a:

(a) Delta
(b) Meander
(c) Estuary
(d) Tributary

Question 29

Where does a river deposit sediments to form a delta?

(a) At its source
(b) In the upper course
(c) At its mouth
(d) In a waterfall

Question 30

Which of the following is a depositional feature formed by waves?

(a) Sea Cliff
(b) Sea Arch
(c) Beach
(d) Sea Stack

Question 31

Which glacial feature is a sharp ridge between two valleys?

(a) Cirque
(b) Arete
(c) Fjord
(d) Moraine

Question 32

What are the materials deposited by a melting glacier called?

(a) Till
(b) Loess
(c) Sand
(d) Silt

Question 33

Streamlined rock ridges carved by wind are known as:

(a) Barchans
(b) Yardangs
(c) Ventifacts
(d) Oasis

Question 34

Crescent-shaped sand dunes formed by a single wind direction are called:

(a) Longitudinal Dunes
(b) Star Dunes
(c) Barchan Dunes
(d) Parabolic Dunes

Question 35

Which of the following is a landform created by underground water?

(a) Delta
(b) Sinkhole
(c) Yardang
(d) Moraine

Question 36

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

(a) Stalagmites
(b) Stalactites
(c) Pillars
(d) Dolines

Question 37

What is the name of the rare mud volcano in India located in the Andaman and Nicobar Islands?

(a) Barren Island
(b) Baratang Island
(c) Havelock Island
(d) Neil Island

Question 38

What is an avalanche?

(a) A sudden flood caused by a glacier melting.
(b) A sudden instability of snow on steep mountain slopes.
(c) A strong wind storm in a desert.
(d) A giant wave caused by an earthquake.

Question 39

What does GLOF stand for?

(a) Global Land Outflow Flood
(b) Glacial Lake Outburst Flood
(c) Great Landslide Overflow Flood
(d) Geological Lake Overflow Flood

Question 40

Which of the following is a cause of dust storms?

(a) Prolonged drought and low rainfall
(b) Heavy rainfall
(c) Dense vegetation
(d) High humidity

Test Completed!

Your Score:

0 / 40

Chapter Summary: Shaping of the Earth's Surface

The Earth's surface is constantly changing due to two main types of forces. Internal forces (endogenic), driven by the heat of the Earth's core, cause the movement of tectonic plates. This movement creates major landforms like mountains, volcanoes, and ocean basins, and causes disasters like earthquakes. The theory of plate tectonics explains how the lithosphere is broken into plates that move over the asthenosphere, creating convergent, divergent, and transform boundaries.

External forces (exogenic), such as weathering and erosion, break down and reshape these landforms over time. Weathering is the breaking down of rocks in place, while erosion involves the movement of broken materials by agents like water, wind, ice, and waves. These agents create diverse landforms such as waterfalls, meanders, deltas, beaches, glacial valleys, sand dunes, and caves. Understanding these processes is crucial for appreciating the dynamic nature of our planet and for preparing for natural disasters like avalanches, GLOFs, dust storms, and landslides.

Important Topics Covered

Theory of Plate Tectonics and Plate Boundaries
Internal vs. External Forces
Weathering (Physical, Chemical, Biological) and Erosion
Agents of Gradation (Running Water, Glaciers, Wind, Waves, Groundwater)
Landforms (Waterfalls, Meanders, Deltas, Beaches, Moraines, Dunes, Stalactites)
Natural Disasters (Earthquakes, Volcanoes, Avalanches, GLOFs, Dust Storms, Landslides)

Why is this Chapter Important?

This chapter is the foundation of physical geography. It explains why the Earth looks the way it does, why some regions are prone to earthquakes while others face floods, and how human life is deeply connected to the natural environment. It also provides crucial knowledge for disaster management and environmental conservation.

Frequently Asked Questions (FAQs)

Q1: What is the theory of plate tectonics?

The theory of plate tectonics, given by W.J. Morgan, explains that the Earth's outermost layer (lithosphere) is broken into large, slowly moving slabs called tectonic plates. These plates move over the semi-molten asthenosphere and are responsible for major physical features and natural phenomena like mountains, earthquakes, and volcanoes.

Q2: What is the difference between weathering and erosion?

Weathering is the process where rocks break down into smaller pieces in their original place (no movement involved). Erosion is the process where these broken materials (soil, rocks) are worn away and carried from one place to another by agents like water, wind, or ice.

Q3: What are the three main types of plate boundaries?

The three main types are: 1. Convergent Boundary (plates move towards each other, forming mountains). 2. Divergent Boundary (plates move away from each other, creating new crust). 3. Transform Boundary (plates slide past each other, causing earthquakes).

Q4: What is a delta and why is it important for humans?

A delta is a landform formed at the mouth of a river where it deposits sediments before entering a sea or lake. It is highly fertile due to rich alluvial soil, making it ideal for agriculture (like rice and jute). Deltas also support dense human settlements, fishing, and trade due to navigable rivers.

Class 9 SST all chapters Chapter 2 Solutions Important Questions

Based on latest NCERT class 9 book.