☰
Motion
What are the causes of soil erosion?
The causes of soil erosion are :
(i) Deforestation - The roots of the plants hold the soil particles tightly and the plants slow down the speed of flowing water thus preventing the soil from erosion.
(ii) Leaving land uncultivated for long time will cause the soil to erode.
(iii) Excessive grazing will remove the vegetation cover of the land and cause soil erosion.
(iv) Flood or heavy rains can wash away the soil and cause soil erosion.
(v) High speed winds can also carry away the top layer of the soil and cause its erosion.
Sponsor Area
Why is water essential for life?
How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?
Write a note on how forests influence the quality of our air, soil and water resources.
What are the two things which are essential for all forms of life on the earth?
What is biosphere?
What are the physical components?
What is biotic component?
Does there exist any relationship between the climate and biotic components? If yes, explain with example.
Sponsor Area
Sponsor Area