Question

Discuss the realms of the earth

Answer 1

LITHOSPHERE - DEFINITION

Lithosphere is the solid crust or the hard top part of the Earth. It is made up of rocks and minerals and covered with a thick layer of soil. It is not a smooth surface as you see on the globe but has high mountains, plateaus or high lands, low plains, deep valleys and very deep basins which are filled with water (oceans).

ATMOSPHERE - DEFINITION

It is one of the four components of the Earth's ecosystem (the other three are biosphere, hydrosphere, and lithosphere). It is a band of gases enveloping the Earth's surface. Ninety-nine percent of its mass is concentrated within 20 miles of the earth's surface.

HYDROSPHERE - DEFINITION

All the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.

BIOSPHERE (HYDROSPHERE, LITHOSPHERE AND ATMOSPHERE) - DEFINITION

Hydrosphere, atmosphere and lithosphere of earth together constitute the biosphere.

Hydrosphere- It is the part of earth covered by 71% of water. Water is essential for supporting life's existence.

Lithosphere- The surface of the earth is called as lithosphere. It supports the growth of microorganisms, plants and animals.

Atmosphere- It is a mixture of gases that surrounds the earth. 78% of the atmosphere is nitrogen, 21% is oxygen and rest 1% consists carbon dioxide, argon and other gases.

hope it helps you...

Answer 2

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The four realms of earth :

• lithosphere

• hydrosphere

• biosphere

• atmosphere.

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Lithosphere : the outer most solid layer of the earth that is composed of rocks and soil is known as lithosphere is also called the crust of the earth.

Hydrosphere: the hydrosphere contains all the water bodies in the world that cover about 71 per cent of the earth's surface.

Biosphere : the biosphere is the narrow zone where the lithosphere , the hydrosphere and the atmosphere come in contact with one another.this realm contains all the living organisms found on the earth.

Atmosphere : the atmosphere surrounds the earth as a layer containing a mixture of gases is held by the gravitational force of the earth.

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