CBSE NCERT Solutions for Class 7 Science Chapter 16

NCERT solutions are explained beautifully using step-by-step approach for all the previous year questions. It acts as an important tool for students in their board exam preparation.

CBSE NCERT Solutions for Class 7 Science Chapter 16:

Question-1:

Explain how groundwater is recharged?

Solution:

The rainwater and water from other sources such as rivers and ponds seeps through
the soil and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called infiltration. The groundwater thus gets recharged by this process.

Question-2:

There are ten tubewells in a lane of fifty houses. What could be the long term
impact on the water table?

Solution:

This will lead to exploitation of water resource present underground if people of all the fifty houses in the lane use the ten tubewells regularly. In long term, the water level will go below and thus the depletion of tubewells.

Question-3:

You have been asked to maintain a garden. How will you minimize the use of water?

Solution:

For minimizing the use of water in maintenance of garden, i will use the technique
of drip irrigation. In this method, required amount water is supplied directly to the roots of the plants using narrow pipes thus preventing the loss of water.

Question-4:

Which one of the following is not responsible for water of shortage?
(i) Rapid growth of industries
(ii) Increasing population
(iii) Heavy rainfall
(iv) Mismanagement of water resource

Solution:

(iii) Heavy rainfall