Design an activity to show the soil erosion on a barren land.

The contamination of soil with waste materials causes soil pollution. Does the use of pesticides in agriculture also contribute to the soil pollution? Explain.

A soil sample was taken from an agricultural land and was weighed. The mass of the soil was found to be 50 g. 100 mL of water was taken in a measuring cylinder and added into the soil sample. The soil absorbed 80 mL of water and rest left in the measuring cylinder. Calculate the absorption rate of water by the soil.

(a) Soil has various important component. Write them.
(b) Arrange the following rock particles which occur in soil in the increasing order. Silt, clay, gravel, sand.
(c) Observe the following figure. What does this figure show?

In towns and cities, generally, the borewells have to be dug very deep to get water as compared to borewells dug in villages. Give suitable reasons.

Soil erosion does not occur easily where the land is covered by vegetation. Do you agree? Explain.

The raw and baked soil differs from each other. How they are different? How can you prepare matkas from soil?

During a field trip, some students visited an agricultural farm and saw a few birds eating earthworms. They enjoyed the scene and then they also started picking and killing the earthworms for pleasure. Seeing the crowd of students in a corner, the teacher rushed to them to see the matter and objected to their action. Anshul, one of the student asked the reason.
Teacher smiled and explained him that an earthworm living in the soil is very beneficial for farmers. Anshul wondered whether there were other organisms also in the soil. The teacher appreciated him and explained.
(a) Mention the importance of earthworm.
(b) List some organisms living in soil.
(c) What are the values shown by Anshul?

A soil sample having mass of 200 g was taken from garden.This soil was dried completely in the oven and again weight. The weight of the soil now was found to be 170 g. Calculate the percentage of water or moisture content present in the sample soil.

Explain the soil profile