Importance of Hydrosphere Questions

The hydrosphere includes lakes, glaciers, rivers, oceans, seas, water in ice sheets, and underground water. It accounts for the total water on the Earth. The hydrosphere covers 71% of the Earth’s surface.

The hydrosphere is important because it provides a habitat for many species of plants and animals. It also helps regulate Earth’s climate by absorbing heat from the sun through evaporation and releasing it back when water vapour condenses into clouds or rain.

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Important Importance of Hydrosphere Questions with Answers

1. Which power is generated using water?

1. Solar power
2. Thermal power
3. Biofuel
4. Hydroelectric power

Answer: d) Hydroelectric power

Explanation: Hydropower is generated through the natural flow of moving water.

2. Hydrosphere includes ______.

1. Water on the surface of the planet
2. Underground water
3. Water in the air
4. All of the above

Answer: d) All of the above

Explanation: Hydrosphere constitutes the sum of water on the surface of the planet, underground water, and water in the air.

3. Is water vapour part of the hydrosphere?

1. YES
2. NO

Answer: a) YES

Explanation: Water vapour is also one of the main constituents of the hydrosphere.

4. State true or false: A planet’s hydrosphere cannot be in liquid or vapour form.

1. TRUE
2. FALSE

Answer: b) FALSE

Explanation: A planet’s hydrosphere can be liquid, vapour, and ice.

5. How much percentage of the Earth is covered with water, approximately?

1. 15%
2. 20%
3. 17%
4. 71%

Answer: d) 71%

Explanation: 71% of Earth’s surface is covered with water.

6. Is saltwater or freshwater present more on the surface of the Earth?

Saltwater accounts for 97.5%, whereas freshwater accounts for only 2.5%.

7. Is water the part of the living cell?

1. YES
2. NO

Answer: a) YES

Explanation: Living cell of the organism is made up of about 75% of water and is the main constituent of the living cell.

8. The average salinity of seawater is ______.

1. 5 grams of salt per kilogram
2. 50 grams of salt per kilogram
3. 15 grams of salt per kilogram
4. 35 grams of salt per kilogram

Answer: d) 35 grams of salt per kilogram

Explanation: Ocean’s average salinity is about 35 grams of salt per kilogram.

9. Mass of Earth’s hydrosphere is about _____.

1. 1.4*10² tonnes
2. 2.4*10¹⁸ tonnes
3. 1.4*10¹⁸ kgs
4. 1.4*10¹⁸ tonnes

Answer: d) 1.4*10¹⁸ tonnes

Explanation: The total mass of Earth’s hydrosphere is 1.4*10¹⁸ tonnes.

10. State true or false: Water plays an important role in regulating the climate.

1. YES
2. NO

Answer: a) YES

Explanation: Water helps in managing temperature on Earth and hence plays an important role in regulating the climate.

Watch the video below to understand the composition of each layer

Practice Questions

1. What is hydrosphere?
2. What are the constituents of the hydrosphere?
3. What is meant by the atmosphere?
4. What are the various layers of the atmosphere?
5. List five importance of the hydrosphere.