Consider the following statements regarding the "Mesosphere": 1. It is the third layer of the atmosphere. 2. It lies immediately above the Thermosphere. 3. It extends up to a height of 400 km. Which of the statements given above is/are correct?

Correct Option The correct option is (a). Explanation The Earth's atmosphere is divided into five distinct layers based on temperature variations and composition: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. The Mesosphere is a critical intermediate layer where temperature decreases with altitude. Statement-wise Analysis - Statement 1 is Correct: The Mesosphere is the third layer of the atmosphere. It is situated directly above the Stratosphere and below the Thermosphere. - Statement 2 is Incorrect: The Mesosphere lies immediately above the Stratosphere. The layer that lies above the Mesosphere is the Thermosphere. The boundary between the Stratosphere and the Mesosphere is called the Stratopause. - Statement 3 is Incorrect: The Mesosphere extends up to a height of approximately 80 km. It is the Thermosphere that extends from 80 km up to roughly 400 km. In the Mesosphere, meteorites burn up upon entering from space. Key Takeaway: The Mesosphere is the third atmospheric layer, extending from 50 km to 80 km altitude, located between the Stratosphere and the Thermosphere, and is the coldest layer of the atmosphere.

NCERT Class 7 Geography — Chapter 1: Air

mcqmedium

Consider the following statements regarding the "Mesosphere":

It is the third layer of the atmosphere.
It lies immediately above the Thermosphere.
It extends up to a height of 400 km.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (a).

Explanation

The Earth's atmosphere is divided into five distinct layers based on temperature variations and composition: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. The Mesosphere is a critical intermediate layer where temperature decreases with altitude.

Statement-wise Analysis

Statement 1 is Correct: The Mesosphere is the third layer of the atmosphere. It is situated directly above the Stratosphere and below the Thermosphere.
Statement 2 is Incorrect: The Mesosphere lies immediately above the Stratosphere. The layer that lies above the Mesosphere is the Thermosphere. The boundary between the Stratosphere and the Mesosphere is called the Stratopause.
Statement 3 is Incorrect: The Mesosphere extends up to a height of approximately 80 km. It is the Thermosphere that extends from 80 km up to roughly 400 km. In the Mesosphere, meteorites burn up upon entering from space.

Key Takeaway: The Mesosphere is the third atmospheric layer, extending from 50 km to 80 km altitude, located between the Stratosphere and the Thermosphere, and is the coldest layer of the atmosphere.

Your note

More from Chapter 1: Air

With reference to the composition of the atmosphere, consider the following statements: 1. Nitrogen is the most plentiful gas in the air. 2. Carbon dioxide and argon together make up the bulk of the atmosphere. 3. Helium and hydrogen are present in the atmosphere in lesser quantities than nitrogen. Which of the statements given above is/are correct?

easy

Which of the following gases is primarily responsible for the "greenhouse effect" by trapping the heat radiated from the earth?

easy

Consider the following statements regarding the circulation of air: 1. When air is heated, it contracts and becomes heavier. 2. Cold air is denser and tends to sink down. 3. Air circulation occurs when cold air from surrounding areas rushes to fill the gap left by rising hot air. Which of the statements given above is/are correct?

medium

With reference to the nitrogen cycle in the atmosphere, consider the following statements: 1. Plants absorb nitrogen directly from the air through their leaves. 2. Bacteria living in the soil and roots of some plants change the form of nitrogen for plant use. 3. Humans absorb all the nitrogen they inhale during breathing. Which of the statements given above is/are correct?

medium

Which one of the following best explains why the balance of carbon dioxide in the atmosphere is getting disturbed?

easy

Keep practising Chapter 1: Air

Work through every question from this NCERT chapter.

Browse all NCERT Class 7 Geography chapters

Correct Option

The correct option is (a).

Explanation

Statement-wise Analysis

Statement 1 is Correct: The Mesosphere is the third layer of the atmosphere. It is situated directly above the Stratosphere and below the Thermosphere.
Statement 2 is Incorrect: The Mesosphere lies immediately above the Stratosphere. The layer that lies above the Mesosphere is the Thermosphere. The boundary between the Stratosphere and the Mesosphere is called the Stratopause.
Statement 3 is Incorrect: The Mesosphere extends up to a height of approximately 80 km. It is the Thermosphere that extends from 80 km up to roughly 400 km. In the Mesosphere, meteorites burn up upon entering from space.