Online Shiksha

By Savita S. More

Class 4 Social Science Our Water Resources

Last updated on July 6th, 2023 at 08:51 pm

What is hydroelectricity?

Hydroelectricity is the production of electricity through the force of water.

 

How are irrigation canals used ?

Irrigation canals are dug so that water can be taken from rivers to various regions that lack water.

 

What is rainwater harvesting?

The purpose of rainwater harvesting is to prevent rainwater from flowing away. Rainwater falling on roofs and on the ground is allowed to flow into a deep hole dug in the ground and collected.

 

Where do the main freshwater sources come from? 

The fresh water we get from water bodies can be divided into two types-surface water and groundwater. Surface water comes from rivers, ponds, lakes, and streams. Groundwater comes from wells and tube wells.

 

What is the reason seawater cannot be used for drinking or irrigation?

Because seawater have a salty taste, they cannot be used as drinking water or for irrigating crops.

 

 

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