Sources of Water


 
 
Concept Explanation
 

Sources of Water

Sources of Water

Rainwater: Rain is our main source of water. It rains when the water vapour in the air condenses. Therefore, rainwater is free from germs and soluble solid impurities. However, it contains dust particles. It also contains some dissolved gases present in the air, such as carbon dioxide. In places where the air is polluted, it may also contain harmful substances such as acids.

Groundwater: When rain falls, some of it immediately evaporates back into the atmosphere. Some runs off the surface forming streams and rivers, and some passes through the soil into the non porous rocks beneath. This is underground water or groundwater. The level of groundwater is called the water table. The groundwater may run along the surface of the non-porous rocks and come out of the surface at some places to form a natural spring. Groundwater is the source of many lakes as well.

.... (More Text Available, Login?)
Sample Questions
(More Questions for each concept available in Login)
Question : 1

The groundwater when collected between the layers of hard rocks is called _____________________

Right Option : A
View Explanation
Explanation
Question : 2

At some places water coming from the underground contains a lot of dissolved minerals and is called _____________

Right Option : B
View Explanation
Explanation
Question : 3

Which of the following are correct :

(a) Rainwater is the purest form of natural water because it is naturally distilled Water.

(b) Surface water is the purest form of natural water because it is naturally distilled Water.

(c) Water found under the ground is actually surface water that has percolated deep into the earth.

Right Option : C
View Explanation
Explanation
 
 


Students / Parents Reviews [20]