Consider the following statements regarding the evolution of landforms: 1. Building mountains is an effect of Diastrophic forces. 2. Glaciers and Sea-waves are agents of Endogenic forces. Which of the statements given above is/are correct?

The correct option is (a) 1 only. Explanation Geomorphic processes are broadly classified into two categories based on the source of energy: Endogenic processes (internal origin) and Exogenic processes (external origin). These forces shape the Earth's surface by creating or modifying landforms. Statement-wise Analysis: - Statement 1 is Correct: Diastrophism encompasses all processes that move, elevate, or build up portions of the Earth's crust. It includes Orogenic processes, which involve mountain building through severe folding and faulting affecting long and narrow belts of the Earth’s crust. Therefore, mountain building is a primary effect of diastrophic forces. - Statement 2 is Incorrect: Glaciers and Sea-waves are geomorphic agents that operate on the surface of the Earth. They derive their energy from the sun (atmospheric circulation) and gravity. These are agents of Exogenic forces (specifically erosion and deposition), not Endogenic forces. Endogenic forces are driven by energy emanating from within the Earth, such as radioactivity and primordial heat. Key Takeaway: Endogenic forces (e.g., Diastrophism, Volcanism) build the relief of the Earth, while Exogenic forces (e.g., Wind, Water, Glaciers) wear down the relief through denudation.

NCERT Class 7 Geography — Chapter 2: Our Changing Earth

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Consider the following statements regarding the evolution of landforms:

Building mountains is an effect of Diastrophic forces.
Glaciers and Sea-waves are agents of Endogenic forces.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2

Did you get this right?

Solution

The correct option is (a) 1 only.

Explanation

Geomorphic processes are broadly classified into two categories based on the source of energy: Endogenic processes (internal origin) and Exogenic processes (external origin). These forces shape the Earth's surface by creating or modifying landforms.

Statement-wise Analysis:

Statement 1 is Correct: Diastrophism encompasses all processes that move, elevate, or build up portions of the Earth's crust. It includes Orogenic processes, which involve mountain building through severe folding and faulting affecting long and narrow belts of the Earth’s crust. Therefore, mountain building is a primary effect of diastrophic forces.
Statement 2 is Incorrect: Glaciers and Sea-waves are geomorphic agents that operate on the surface of the Earth. They derive their energy from the sun (atmospheric circulation) and gravity. These are agents of Exogenic forces (specifically erosion and deposition), not Endogenic forces. Endogenic forces are driven by energy emanating from within the Earth, such as radioactivity and primordial heat.

Key Takeaway: Endogenic forces (e.g., Diastrophism, Volcanism) build the relief of the Earth, while Exogenic forces (e.g., Wind, Water, Glaciers) wear down the relief through denudation.

Your note

More from Chapter 2: Our Changing Earth

Consider the following statements regarding the Lithospheric plates: 1. They move around very slowly, just a few millimetres each year. 2. Their movement is driven by the rotation of the earth on its axis. 3. The molten magma inside the earth moves in a circular manner. Which of the statements given above is/are correct?

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With reference to Earth movements, consider the following statements: 1. Endogenic forces work on the surface of the earth. 2. Diastrophic forces are a type of Endogenic force. 3. Sudden forces can cause mass destruction over the surface of the earth. Which of the statements given above is/are correct?

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The lithosphere is broken into a number of plates known as:

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What causes the movement of Lithospheric plates?

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Forces that work on the surface of the earth are technically termed as:

easy

Keep practising Chapter 2: Our Changing Earth

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The correct option is (a) 1 only.

Explanation

Statement-wise Analysis:

Statement 1 is Correct: Diastrophism encompasses all processes that move, elevate, or build up portions of the Earth's crust. It includes Orogenic processes, which involve mountain building through severe folding and faulting affecting long and narrow belts of the Earth’s crust. Therefore, mountain building is a primary effect of diastrophic forces.
Statement 2 is Incorrect: Glaciers and Sea-waves are geomorphic agents that operate on the surface of the Earth. They derive their energy from the sun (atmospheric circulation) and gravity. These are agents of Exogenic forces (specifically erosion and deposition), not Endogenic forces. Endogenic forces are driven by energy emanating from within the Earth, such as radioactivity and primordial heat.

Key Takeaway: Endogenic forces (e.g., Diastrophism, Volcanism) build the relief of the Earth, while Exogenic forces (e.g., Wind, Water, Glaciers) wear down the relief through denudation.