Question

(a) 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.

(b) Sketch the cross section of soil and label the various layers.

(c)Radha conducted an experiment in the field related to the rate of percolation. She

observed that it took 40 min for 200 mL of water to percolate through the soil sample.

Calculate the rate of percolation.​

Answer 1

ans.b. (see image attached above)

ans.a No, it is not a good practice to remove grass and small

plants that are growing in an open,unused field.

Because wild green coverage is an important part of our ecosystem. It also prevents soil erosion and maintains groundwater level.

ans.c.

rate of percolation = water absorbed per minute.

therefore, if 200 ml of water is absorbed in 40 minutes, the rate of percolation is 200/40 i.e. 5 ml per minute.