Case Study Questions for Class 7 Social Science Geography Chapter 3 Our Changing Earth

Case Study Questions for Class 7 Social Science Geography Chapter 3 Our Changing Earth

Here in this article, we are providing Case Study Questions for Class 7 Social Science. In case study or passage-based questions, a paragraph will be given, and then the MCQ Questions based on it will be asked. For Social Science Subjects, there would be 5 case-based sub-parts questions, wherein a student has to attempt 4 sub-part questions.

Our Changing Earth Class 7 Case Study

Case Study Question 1:

The landscape is being continuously worn away by two processes-weathering and erosion. Weathering is the breaking up of the rocks on the earth’s surface. Erosion is the wearing away of the landscape by different agents like water, wind and ice. The eroded material is carried away or transported by water, wind, etc. and eventually deposited. This process of erosion and deposition create different landforms on the surface of the earth.

Work of a River: The running water in the river erodes the landscape. When the river tumbles at steep angle over very hard rocks or down a steep valley side, it forms a waterfall. As the river enters the plain, it twists and turns forming large bends known as meanders. Due to continuous erosion and deposition along the sides of the meander, the ends of the meander loop come closer and closer. In due course of time the meander loop cuts off from the river and forms a cut-off lake, also called an oxbow lake. At times the river overflows its banks. This leads to the flooding of the neighbouring areas. As it floods, it deposits layers of fine soil and other material called sediments along its banks. This leads to the formation of a flat fertile floodplain. The raised banks are called levees. As the river approaches the sea, the speed of the flowing water decreases and the river begins to break up into a number of streams called distributaries. The river becomes so slow that it begins to deposit its load. Each distributary forms its own mouth. The collection of sediments from all the mouths forms a delta.

Q. 1. The landscape is being continuously worn away by two processes.
(a) weathering
(b) erosion
(c) plate tectonic
(d) both (a) and (b)

Ans. Option (c) is correct.
Explanation: Weathering: The breaking up of the rocks on the earth’s surface. Erosion: The wearing away of the landscape by different agents like water, wind and ice.

Q. 2. Give an example of the agents of Erosion.
(a) water
(b) wind
(c) ice
(d) all of the above

Ans. Option (d) is correct.
Explanation: Erosion is the wearing away of the landscape by different agents like water, wind and ice. The eroded material is carried away or transported by water, wind, etc. and eventually deposited.

Q. 3. Which form is created by river?
(a) waterfall
(b) sand dunes
(c) glaciers
(d) mushroom rocks

Ans. Option (a) is correct.
Explanation: When the river tumbles at steep angle over very hard rocks or down a steep valley side it forms a waterfall.

Q. 4. What is a Delta?
(a) steep valley side
(b) the collection of sediments from all the mouths
(c) river enters the plain, it twists and turns forming large bends
(d) none of the above

Ans. Option (b) is correct.
Explanation: The river becomes so slow that it begins to deposit its load. Each distributary forms its own mouth. The collection of sediments from all the mouths forms a delta. Biggest delta in the world in India (West Bengal, Sundarban) created by the river Ganga.

Q. 5. The Niagara Falls is located on border between:
(a) Canada and Russia
(b) South Africa and India
(c) Canada and USA
(d) none

Ans. Option (c) is correct.
Explanation: The Niagara Falls is located on border between Canada and USA in North America.

Our Changing Earth – Introduction

The lithosphere is broken into a number of plates known as the Lithospheric plates. These plates move around very slowly – just a few millimeters each year. This is because of the movement of the molten magma inside the earth. The molten magma inside the earth moves in a circular manner as shown in the activity. The movement of these plates causes changes on the surface of the earth. The earth movements are divided on the basis of the forces which cause them.

Learning Outcomes

• Lithosphere is broken up into several plates, known as lithospheric plates. L-Waves (Surface waves).
• These plates move around very slowly. The movement of these plates causes changes on the surface of the earth.
• These movements are divided on the basis of forces which cause them.
  The forces which act in the interior of the earth are called as Endogenic forces and the forces that work on the surface of the earth are called as Exogenic forces.
• Endogenic earthquakes and eruptions.
• Exogenic force causes weathering, erosion, deposition and gradation.
• Earthquakes are sudden vibrations inside the earth’s crust. The place in the crust where the movement starts is known as the focus. The epicentre of the earthquake is the place on the surface above the focus.
• Earthquake is measured by seismograph and its intensity is measured by Richter scale.
• Weathering is the breaking up of the rocks on the earth’s crust.
• Erosion is the wearing away of the landscape by different agents like water, wind and ice.
• Large bends formed by twisting and turning of the river while entering the plains are called meanders.
• An ox-bow lake is a cut-off lake formed due to cut-off of a meander loop.
• Wind is an active agent of erosion and deposition in the deserts.

Important Keywords

• Weathering: The breaking up of the rocks on the earth’s surface.
• Sedimentary: The wearing away of the landscape by different agents like water, wind and ice. Sea caves, Sea arches, Stacks and Sea cliff: Over the time, sea-rock cracks become larger and wider. Thus, hollow caves are formed on the rocks. They are called Sea caves. As those sea caves become bigger and bigger and only the roofs of the caves remain, thus Sea arches are formed. Further, erosion breaks the roof and only walls are left. These walls like features are called Stacks. The steep rocky coast rising almost vertically above the sea water is called Sea cliff.

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Class 7 Social Science Geography: Our Environment

Chapter 1 Environment
Chapter 2 Inside Our Earth
Chapter 3 Our Changing Earth
Chapter 4 Air
Chapter 5 Water
Chapter 6 Natural Vegetation and Wildlife
Chapter 7 Human Environment – Settlement, Transport, and Communication
Chapter 8 Human Environment Interactions – The Tropical and the Subtropical Region
Chapter 9 Life in the Temperate Grasslands
Chapter 10 Life in the Deserts

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Class 7 Social Science History: Our Pasts – II

Chapter 1 Tracing Changes Through a Thousand Years
Chapter 2 New Kings and Kingdoms
Chapter 3 The Delhi Sultans
Chapter 4 The Mughal Empire
Chapter 5 Rulers and Buildings
Chapter 6 Towns, Traders, and Craftsperson
Chapter 7 Tribes, Nomads and Settled Communities
Chapter 8 Devotional Paths to the Divine
Chapter 9 The Making of Regional Cultures
Chapter 10 Eighteenth-Century Political Formations

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Class 7 Social Science Civics: Social and Political Life – II

Chapter 1 On Equality
Chapter 2 Role of the Government in Health
Chapter 3 How the State Government Works
Chapter 4 Growing Up as Boys and Girls
Chapter 5 Women Change the World
Chapter 6 Understanding Media
Chapter 7 Understanding Advertising
Chapter 8 Markets Around Us
Chapter 9 A Shirt in the Market

What is Case Study Question in Class 7 Social Science?

Case study questions typically present a specific scenario or case related to a historical event, geographical issue, or social problem. Students are expected to read and understand the details of the case and then answer a set of questions based on their understanding and knowledge of the subject matter.

Case study questions can be an effective way to assess students’ understanding and ability to apply social science concepts to practical situations. They also encourage students to think critically, analyze information, and draw informed conclusions – skills that are valuable both inside and outside the classroom.