Question

Q16. Name the four major domains of the earth. Why is the earth blue planet

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Answer 1

Answer:

Lithosphere – Lithosphere is the solid shell of the earth and is divided into a crust and mantle.

Atmosphere – Atmosphere is a layer of gases surrounding a planet, held in place by the gravity of the body.

Hydrosphere – Hydrosphere is the combined mass of water present on the surface or under the surface, on a planet.

Most of us are curious to know why the Earth is called a blue planet. A general statement about the blue appearance of Earth from outer surface is that “The Earth has almost 70% water on its surface due to which it looks blue in color”.

Answer 2

Answer:

The four major domains of the EARTH are as follows:

1. Atmosphere- It is the envelope of air surrounding the earth. It extend upto a height of about 10,000 km.

2. Lithosphere- It is the solid layer surrounding the surface of the earth. The upper layer is the CRUST.

3. Hydrosphere- It is layer which comprises of all the oceans, rivers, lakes,etc.

4. Biosphere- It is the combination of all the three layers: Atmosphere, Hydrosphere and Lithosphere.

The EARTH is called a blue planet because 71% of the Earth's surface is covered with water including all the water bodies oceans, rivers, lakes, ponds, etc.

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