Major Domain of The Earth

                           

1(1). 

What are the four major domains of the earth?
 

Ans. 

The four major domains of the earth are:

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

 

1(2). 

Name the major continents of the earth.
 

Ans. 

A continent is one of several very large landmasses of the world. The major continents of the earth are Asia, Africa, North America, South America, Europe, Australia and Antarctica.

 

1(3). 

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

Ans. 

The Southern Hemisphere is the half of Earth that is south of the Equator. The two continents of the Southern Hemisphere are Antarctica and Australia.

 

1(4). 

Name the different layers of atmosphere.
 

Ans. 

The different layers of the atmosphere are Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere.

 

1(5). 

Why is the earth called the ‘Blue Planet’?
 

Ans. 

71% of the earth's surface is covered with water because of which the earth appears blue from the space and hence it is called the blue planet.

 

1(6). 

Why is the Northern Hemisphere called the Land Hemisphere?
 

Ans. 

The Northern Hemisphere is the half of Earth that is north of the Equator. The greater part of Earth's landmass lies in the Northern Hemisphere. Thus, it is called land hemisphere.

 

1(7). 

Why is the biosphere important for living organisms?
 

Ans. 

The biosphere is the layer of the planet Earth where life exists. The biosphere is that narrow zone of contact between land, water and air which is essential for life.

 

2(1). 

The mountain range that separates Europe from Asia is:

 

1)   

The Himalayas

2)   

None of these

3)   

The Andes

4)   

The Urals

 Ans. 4)   The Urals

 

2(2). 

The continent of North America is linked to South America by:

 

1)   

a Canal

2)   

a Strait

3)   

Mountain

4)   

an Isthmus
 

Ans. 4)   an Isthmus
 

2(3). 

The major constituent of atmosphere by percent is

 

1)   

Oxygen

2)   

Hydrogen

3)   

Carbon

4)   

Nitrogen

Ans. 4)   Nitrogen

The atmosphere is composed mainly of nitrogen and oxygen, which make up about 99 per cent of clean, dry air. Nitrogen 78 per cent, oxygen 21 per cent and other gases like carbondioxide, argon and others comprise 1 per cent by volume.

 

2(4). 

The domain of the earth consisting of Ansid rocks is

 

1)   

Atmosphere

2)   

Hydrosphere

3)   

Lithosphere

4)   

Mesosphere

Ans. 3)   Lithosphere

The Ansid portion of the earth on which we live is called the Lithosphere.

 

2(5). 

Which is the largest continent?

 

1)   

Asia

2)   

None of these

3)   

Africa

4)   

Australia

Ans. 1)   Asia

Asia is the largest continent. It covers about one-third of the total land area of the earth. The continent lies in the Eastern Hemisphere.

 

3(1). 

The deepest point on the Earth is ________ in the Pacific Ocean.

Ans 1. Marina Trench

 

3(2). 

The ________ ocean is named after a country.

Ans 1. Indian

 

3(3). 

The ________ is a narrow contact of land, water and air that supports life.

Ans 1. Biosphere


3(4). 

The continents of Europe and Asia together are known as ________.

Ans 1. Eurasia

 

3(5). 

The highest mountain peak on the Earth is ________.

Ans 1. Mount Everest