NCERT Class 6 Geography — Chapter 2: Major Domains of the Earth

mcqeasy

Which one of the following terms describes the narrow zone where land, water, and air are found together and which contains all forms of life?

Official previous-year question

Verified 1 Aug 2026.

Options

AStratosphere
BBiosphere
CExosphere
DLithosphere

Did you get this right?

Solution

The correct option is

Biosphere

Explanation

The Earth is composed of four major domains: the Lithosphere, Hydrosphere, Atmosphere, and Biosphere. The interaction between these domains creates the specific conditions necessary to sustain life.

Lithosphere is incorrect: The Lithosphere refers to the solid portion of the Earth, consisting of the crust and the uppermost mantle. While it provides the physical surface for organisms, it is distinct from the zone of interaction involving water and air.
Stratosphere is incorrect: The Stratosphere is the second layer of the Earth's atmosphere, situated above the troposphere. It contains the ozone layer but is not the zone where land, water, and air converge to support life.
Biosphere is correct: The Biosphere is the narrow zone of contact between the land (lithosphere), water (hydrosphere), and air (atmosphere). It is within this unique zone that life exists. It encompasses all living organisms and the environments in which they interact.
Exosphere is incorrect: The Exosphere is the outermost layer of the Earth's atmosphere, transitioning into outer space. It consists of extremely rarefied gases and does not support life.

Key Takeaway: The Biosphere is the global ecological system integrating all living beings and their relationships, formed by the intersection of the lithosphere, hydrosphere, and atmosphere.

Your note

More from Chapter 2: Major Domains of the Earth

Consider the following statements regarding the continents of the world: 1. Asia is the largest continent and covers about one-third of the total land area of the earth. 2. The Equator passes through the center of the Asian continent. 3. Asia is separated from Europe by the Andes Mountains on the west. Which of the statements given above is/are correct?

medium

With reference to the Lithosphere, consider the following statements: 1. It comprises the rocks of the earth’s crust and the thin layers of soil. 2. The elevation of land is measured from the ocean floor. 3. The level of seawater remains the same everywhere. Which of the statements given above is/are correct?

medium

Consider the following pairs regarding the shapes of major oceans: Ocean | Shape/Characteristic 1. Pacific Ocean | Almost circular 2. Atlantic Ocean | 'S' shaped 3. Indian Ocean | Almost triangular 4. Arctic Ocean | Highly indented coastline How many of the pairs given above are correctly matched?

medium

Which of the following continents is the only one through which the Tropic of Cancer, the Equator, and the Tropic of Capricorn pass?

easy

With reference to the atmosphere, consider the following statements: 1. The atmosphere extends up to a height of about 100 kilometres. 2. The density of the atmosphere is maximum at the sea level and decreases rapidly as we go up. 3. Nitrogen makes up 78 per cent of clean, dry air. Which of the statements given above is/are correct?

medium

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The correct option is

Biosphere

Explanation

The Earth is composed of four major domains: the Lithosphere, Hydrosphere, Atmosphere, and Biosphere. The interaction between these domains creates the specific conditions necessary to sustain life.

Lithosphere is incorrect: The Lithosphere refers to the solid portion of the Earth, consisting of the crust and the uppermost mantle. While it provides the physical surface for organisms, it is distinct from the zone of interaction involving water and air.
Stratosphere is incorrect: The Stratosphere is the second layer of the Earth's atmosphere, situated above the troposphere. It contains the ozone layer but is not the zone where land, water, and air converge to support life.
Biosphere is correct: The Biosphere is the narrow zone of contact between the land (lithosphere), water (hydrosphere), and air (atmosphere). It is within this unique zone that life exists. It encompasses all living organisms and the environments in which they interact.
Exosphere is incorrect: The Exosphere is the outermost layer of the Earth's atmosphere, transitioning into outer space. It consists of extremely rarefied gases and does not support life.

Key Takeaway: The Biosphere is the global ecological system integrating all living beings and their relationships, formed by the intersection of the lithosphere, hydrosphere, and atmosphere.