CLASS 6 - GEOGRAPHY - CH 5 : MAJOR DOMAINS OF THE EARTH

Q.1 : What is Lithosphere ? What does it comprise of ?

Ans : The solid portion of the earth in which we live is called lithosphere . It comprises the rocks of the earth's crust and the thin layer of soil that contain nutrient elements which sustain organisms . 

Q.2 : What are the two main divisions of Earth surface ?

Ans : The two main divisons of earth surface are - continents and ocean basins.

Q.3 : Why is Earth called blue planet?

Ans : The Earth is called blue planet because more than 71% of the earth is covered with water .

Q.4 : What is global warming?

Ans : Carbon dioxide is an important constituent of air . But increase in the amount of carbon dioxide lead to increase in global temperatures as carbon dioxide absorbs heat . This is termed as global warming . 

Q.5 : Name some ways in which air get polluted?

Ans : Air gets polluted with emission from industries , thermal power plants and vehicles.

Q.6: Name the continents that surround the Pacific ocean?

Ans : The continents that surround the Pacific ocean are - Asia , Australia , North America and South America.

Q.7 : Name the research stations of India located in Antarctica?

Ans : Maitri , Dakshin Gangotri

Q.8 : What are four major domains of the earth ?

Ans : The four major domains of the earth are - Lithosphere , atmosphere , hydrosphere and biosphere.

Q.9 : What is the importance of 'biosphere'?

Ans : Biosphere is the narrow zone of contact between land,water and air . It is in this zone that life , that unique to Earth exists. All the living organisms including humans are linked to each other and to the biosphere for survival . 

Q.10: Identify the main gases and their percentage in the atmosphere?

Ans : The atmosphere is composed of nitrogen 78% , oxygen 21% and other gases such as carbon dioxide and argon that comprise 1% by volume.

Q.11: What is Marina Trench ? Where it is located ?

Ans : Marina Trench is the deepest part of the earth . It lies in the Pacific Ocean.

Name the following

1. Name the longest river of the world ?

Ans: Nile

2. Name the largest continent of the world ?

Ans : Asia

3. Which is the largest hot desert ?

Ans : The Sahara Desert

4. Name the smallest continent of the world ?

Ans : Australia

5. Name the largest ocean of the world ?

Ans : Pacific ocean

6. Name the major continents of the earth ?

Ans : There are seven major continents of the earth . These continents are - Asia , Africa , Europe , North America , South America , Australia and Antarctica.

7. Name the major oceans of the earth ?

Ans: The five major oceans are - the Pacific Ocean , the Atlantic Ocean , the Indian Ocean , the Southern Ocean and the Arctic Ocean . 

8. Name the first men to climb the highest peak , Mt. Everest?

Ans : Edmund Hilary and Tenzing Norgay

9. The major constituent of atmosphere by percent is 

Ans : Nitrogen 78%

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

Ans: Isthmus

11. Name the continent does the Tropic of Cancer , Tropic of Capricorn and Equator pass ?

Ans : Africa

12 : What is the height of Mt. Everest from sea level ?

Ans : 8848m

13. Which is the third largest continent of the world ?

Ans : North America

14. Which domain of the Earth consist of water in all its forms ?

Ans : Hydrosphere

15. Which continent is called island continent ?

Ans : Australia

16. How much percent of earth is covered with water ?

Ans : 71%

17. Which continent is bounded by water bodies on three sides ?

Ans : Europe

18: Which continent lies in west of Asia ?

Ans : Europe

19. Which ocean is 'S' shaped ?

Ans : Atlantic ocean

20. Which continent does not surround the Pacific ocean ?

Ans : Africa

21. Name the chief movements of ocean waters ?

Ans : The three chief movements of ocean waters are - tides , waves and ocean currents.