NCERT Solutions Class 6 Social Science Geography

Chapter 5: Major domains of the Earth

Answer the following questions briefly.

a. What are the four major domains of the earth?

Answer: The four major domains of the Earth are:

1. Lithosphere
2. Atmosphere
3. Hydrosphere
4. Biosphere

b. Name the major continents of the earth?

Answer: The seven major continents of the Earth are:

1. Asia
2. Europe
3. Africa
4. North America
5. South America
6. Australia
7. Antartica

c. Name the two continents that lie entirely in the Southern Hemisphere.

Answer: The two continents that lie entirely in the Southern Hemisphere are Australia and Antartica.

d. Name the different layers of atmosphere.

Answer: The five different layers of atmosphere are:

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere
5. Exosphere
6. Why is the earth called the 'blue planet'?

Answer: The Earth is called the 'blue planet' because 71% of the earth's surface is covered with water. Only 29% is the area with land.

e. Why is the Northern Hemisphere called the Land Hemisphere?

Answer: The major part of the land lies in the Northern Hemisphere. Hence, it is called the Land Hemisphere.

f. Why is the Biosphere important for living organisms?

Answer: Biopshere is the contact zone between the land, water, and air. It is the only zone on the Earth that supports life. All the living organisms including microbes to humans are linked to each other and to the biosphere for survival.

2. Tick the correct answers.

a. The mountain range that separates Europe from Asia isv

1. The Andes
2. thr Himalayas
3. the Urals

Answer: iii. the Urals

Explanation:Asia is separated from Europe by the Ural mountains on the west.

b. The continent of North America is linked to South America by

1. an Isthmus
2. a Strait
3. a Canal

Answer: i. an Isthmus

Explanation: Isthmus is a narrow strip of land that connects the two continents North America and South America.

c. The major constituent of atmosphere by per cent is

1. Nitrogen
2. Oxygen
3. Carbon dioxide

Answer: i. Nitrogen

Explanation: Nitrogen is 78% by volume.

d. The domain of the earth consisting of solid rocks is

1. the Atmosphere
2. the Hydrosphere
3. the Lithosphere

Answer: iii. the Lithosphere

Explanation: Lithosphere is the solid portion of the Earth. It comprises the rocks of the earth's crust and the thin layers of soil that contain nutrient elements which sustain organisms.

e. What is the largest contient?

1. Africa
2. Asia
3. Australia

Answer: ii. Asia

Explanation: Asia is the largest cotinent among the seven major continents.

3. Fill in the blanks.

1. The deepest point on the earth is Mariana Trench in the Pacific Ocean.
2. The Indian Ocean is named after a country.
3. The Biosphere is a narrow contact zone of land, water, and air that supports life.
4. The continents of Europe and Asia together are known as Eurasia.
5. The highest moutain peak on the earth is Mount Everest.