Question

1.what is the percentage of soil .
2.what is the full form of nios.
3.what is food chain .
4.what is sludge.
5.briefly describe the water cycle with diagram .
?

Answer 1

1) Composition of undisturbed soil, by volume, is 45 percent mineral matter, 25 percent soil water, 25 percent soil air, and 5 percent organic matter. Composition of compacted soil, by volume, is 74 percent mineral matter, 18 percent soil water, 6 percent soil air, and 2 percent organic matter.

2) National Institute of Open Schooling.

3) Food chain is a type of chain in which different organisms are depends on each other for the survival. Who eats what in environment makes up food chain.
The study of food chain shows us the interdependence of various organisms in the environment.

4) thick and soft mud.
Sludge is a semi-solid slurry and can be produced as sewage sludge from wastewater treatment processes or as a settled suspension obtained from conventional drinking water treatment and numerous other industrial processes. The term is also sometimes used as a generic term for solids separated from suspension in a liquid; this 'soupy' material usually contains significant quantities of 'interstitial' water (between the solid particles).

5) The three forms of water undergoes continuous cycling to keep the total amount of water on the Earth constant.

Answer 2

2. national institute is open schooling..

3. it is a kind of chain formed where we come interdependence of one organism into another..

4 it is a semi solid slurry used to.priduce biogas.

5. water cycle the evaporation of water from sea , going up at higher altitudes and condensing and collection to form clouds.. and they when get heavier, they precipitate in form of rain.


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