12. Long answer questions I

1. How does rainwater harvesting structures recharge ground water?

 

a.  is a technique of collecting and storing rainwater for future use.

 

b. The primary goal of rainwater harvesting is to allow the rainwater to percolate into the ground to replenish or recharge the  levels.

 

c. In  rainwater harvesting, the rainwater falling on the roofs of houses, apartments, commercial buildings, and other structures is collected and stored in a surface tank to be used for domestic purposes.

 

d.  collects rainwater from rooftops or open spaces and filters before being routed into percolation pits via pipes.

 

e.  are small ponds where you can collect rainwater. 

 

2. How will you prevent soil erosion?

 

a. Deforestation can prevent soil erosion. FalseTrue

 

b. Overgrazing prevents soil erosion.  FalseTrue

 

c. Crop rotation helps in reducing soil erosion and increases soil fertility and crop yield. TrueFalse

 

d. Reforestation, terracing and contour ploughing cause soil erosion. TrueFalse

 

e. Planting trees in the form of a shelterbelt can help control the wind speed, and protects from soil erosion. FalseTrue