A small paragraph of
Lithosphere , Atmosphere , Hydrosphere , Bisophere
Class 6 NCERT
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Answers
Explanation:
Lithosphere
1. The outermost part of the Earth which consists of Upper Mantle and Crust of the Earth is known as Lithosphere.
2. Tectonic plates are a subdivision of Lithosphere.
3. Lithosphere has rigid mechanical properties. Pedosphere is the uppermost part of the lithosphere which reacts chemically with other 3 other major domains of earth namely; hydrosphere, biosphere and atmosphere.
4. Thickness – about 100 km.
Hydrosphere
1. The hydrosphere includes water on earth in Oceans, Seas, Rivers, Lakes and even in frozen forms.
2. Only 2.5% of Earths water is freshwater. And even in this 2.5%; approximately 69% is in the form of snow and ice.
3. 97.5% of Earths water is saltwater, which is unfit for human consumption.
4. Approximately 71% of the Earth surface is covered by oceans.
Atmosphere
1. The earth is surrounded by a layer of gas called the atmosphere.
2. The atmosphere extends up to a height of about 1,600 kilometres.
3. The atmosphere is divided into five layers based on composition, temperature and other properties and they are:
a. the troposphere
b. the stratosphere
c. the mesosphere
d. the thermosphere
e. the exosphere
4. About 99 per cent of clean and dry air in the atmosphere is composed mainly of nitrogen and oxygen. Nitrogen 78 per cent, oxygen 21 per cent and other gases like carbon dioxide, argon and others comprise 1 per cent by volume.
Biosphere – The Domain of Life
1. The biosphere is the narrow zone of contact between the land, water and air.
2. It is the zone where life exists that makes this planet unique.
3. The organisms in the biosphere are commonly divided into:
a. the plant kingdom
b. the animal kingdom
4. The three domains of the earth interact with each other and affect each other in some way or the other.
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Answer:
Lithosphere
- the lithosphere is the rigid, outermost shell of a terrestrial-type planet or natural satellite. On Earth, it is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of up to thousands of years or more.
Atmosphere
- An atmosphere is a layer of gas or layers of gases that envelope a planet and is held in place by the gravity of the planetary body.
Hydrosphere
- The hydrosphere is the combined mass of water found on, under, and above the surface of a planet, minor planet, or natural satellite. Although Earth's hydrosphere has been around for about 4 billion years, it continues to change in shape.
Bisophere
- The biosphere, also known as the ecosphere, is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth. The biosphere is virtually a closed system about the matter, with minimal inputs and outputs.