Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.

Rock, Clay, Sand, Gravel, Silt

Unscramble the following jumbled words related to soil.

Razia conducted an experiment in the field related to the rate of percolation. She observed that it took 40 min for 200mL of water to percolate through the soil sample. Calculate the rate of percolation.

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

How can a farmer convert acidic soil to neutral soil?

Rajasthan is a desert state in India. Once while travelling to Rajasthan by train, Boojho observed several streams and rivulets of rain water during the journey but to his surprise he did not see streams of water in the desert region even during rains. Help Boojho find a suitable explanation for this.

Is it a good practice to remove grass and small plants that are growing in an open, unused field? Give reason to support your answer.

Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.

Rock, Clay, Sand, Gravel, Silt

Read the following statements and give the appropriate terms for each of them.

(a) The process of breakdown of rocks by the action of wind, water, sunlight.

(b) Removal of top soil during heavy rains or strong winds.

(c) Accumulation of wastes in the soil generated by human activity which alter the features of soil.

(d) The process of movement of water into deeper layers of soil.

Soil conservation measures are mainly aimed at protecting which of the following?

Read the following statements with reference to soil.

(i) Weathering is a very fast process of soil formation.

(ii) Percolation of water is faster in sandy soils.

(iii) Loamy soil contains only sand and clay.

(iv) Top soil contains the maximum amount of humus.

Choose the correct statements from the above.