Question

(d) Radol
7. Answer in your own words.
how soil is formed.
and
even though it occupies about 71%
of the earth's surface?
(c) What are the various constituents of
air? Write their uses.
(d) Why are air, water and land
considered to be valuable natural
resources ?
(a) Explain with the help of a diagram
(b) Why is there a shortage of water​

Answer 1

Answer:

DU SOL formation on the land is formed of bio natural process the abiotic component of a natural natural are supplied through the weathering of the Bedrock due to the cold and water on the surface wind and rain respectively the Bedrock break down into pieces stones sand and soil are formed from the pieces micro was warm and insect from among them the rodent rodents like Mice and rats are also found your the root of 3 growing on the land also has a withering rocks the process of soil formation is also and continuous it take about the 1000 years for 2.5 thick layer of mature soil to form 81% occupy about on the earth surface because it is a it is salty water the air in the atmosphere around the earth contain Nitrogen Oxygen and Carbon dioxide since in Incheon classes Nitrogen dioxide Sulphur Dioxide water vapour and dust particle the prosperous beer contain content about 80% of the total mass of gases in the air when the proportion in about 90% in the stratosphere for the Mischief year and I should I not spared the proportion of the mass of gases goes on decreasing gas are not found in the exposure and beyond

Answer 2

Explanation:

because all the 71 % is in the form of salty water present in oceans and seas. so It cannot be utilised for daily purposes like bathing ,drinking etc.

The soil is formed in millions of year. The soil is made up of very small particles . the soil is a thin layer of material covering the earth surface and is formed from the weathering of rocks. it is made up mainly of mineral particles , organic materials , air , water and living organism.

There is a shortage of water even though almost three-fourths of the earth is covered with water because 97.5% of water is sea and ocean water. This water cannot be used directly as it has high salt content.

c. there are so many constituents of air in which nitrogen ,oxygen, carbon dioxide are major one. d. air ,water and land are considered to be valuable because they are basic sources or materials for our needs and are crucial for our life .

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