Question

Our earth is the only planet known to have life. Life exists on the earth due to
its four realms. Identify the realms of the earth and point out the importance of
each realm.

Answer 1

Answer:

the 4 realms of earth are

1.lithosphere

2. hydrosphere

3.biosphere

4.atmosphere

lithosphere provides minerals

hydrosphere provides water

atmosphere provides oxygen which is very important for an individual to survive

and biosphere is the together form of lithosphere,hydrosphere, and atmosphere

Answer 2

Solution

The four realms of the earth :

Lithosphere,

Hydrosphere,

Biosphere

Atmosphere.

Lithosphere: The realm of land is called the lithosphere. The word lithosphere comes from a Greek word Lithos which means rock. It is the outer solid layer of earth which is composed of rocks and soils.

Hydrosphere: The realm of water is called the hydrosphere. This layer covers 71 per cent of the earth surface.

Biosphere: The narrow zone where land, water and air meet is called the biosphere. It is the fourth realm of the earth, and it supports life.

Atmosphere: The atmosphere is the envelope of gases surrounding Earth that extends up to approximately 10,000 km above Earth’s surface. The bottom four layers of the atmosphere are troposphere, stratosphere, mesosphere, and ionosphere.