Q4 of 10 Page 105

Explain how soil is formed.

Soil is formed by the process of weathering. It is a slow process in which the rocks breakdown by the action of air, wind and water. As a result of the process, large rock pieces are converted into small particles. These small particles mix with humus (organic matter) and form soil.


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2

The water holding capacity is highest in

(i) Sandy soil


(ii) Clayey soil


(iii) loamy soil


(iv) mixture of sand and loam

 3

Match the items in Column I with those in Column II:



























Column I



Column II



(i) A home for living



(a) Large organisms particles



(ii) Upper layer of the



(b) All kind of soil soil



(iii) Sandy soil



(c) Dark in colour



(iv) Middle layer of the



(d) Small soil particles and packed tight



(v) Clayey Soil



(e) Lesser amount of humus


 5

How is clayey soil is useful for crops?

 6

List the differences between clayey soil and sandy soil.