2.
3.
Why is the Earth known as the blue planet?
List at least one important point of each realm of the Earth.
Explain the importance of the biosphere.
4.Explain the importance of biosphere
Answers
Answer:
the earth is known a blue planet because most of the part of the earth are covered with ocean so from space it can be seen as a blue planet
Answer:
Earth is our home. It is also the only planet with oceans. In fact, Earth is covered mostly with water. That is why it is called the Blue Planet.
The four realms of earth : lithosphere , hydrosphere , biosphere and atmosphere
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.
The biosphere is defined as the zone where both living organisms and the products of their activities are found. So it plays an important role to maintain the ecosystems, that is the life of organisms and their mutual interactions. ... Without the biosphere, life on Earth as we know it would not exist.
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.