After the completion of
this lesson, students will be able to:
* understand the
importance, properties and uses of water.
* write the chemical
equations for the reaction of water.
* explain water
* discuss about
different methods of softening water.
* know about the
causes and consequences of water pollution.
* list out the ways by
which water pollution may be controlled.
நீர்இன்று அமையாது உலெகனின் யார்யார்க்கும்
வான்இன்று அமையாது ஒழுக்கு – குறள்
Thirukkural says, without water
there would be no life on the earth. Just like other living organisms, we also
need water to survive. We need water for so many activities like cooking,
washing, cleaning and irrigation. Water resources are getting depleted nowadays
because of growing demand from increasing populations and lifestyle changes.
There is also a reduction in the supply of water due to pollution of water
sources and climate change which contributes to the rising variability in
rainfall. We all depend on water for our living and so every individual is
responsible for saving water. In this lesson, we will learn about the sources,
properties and uses of water and also about water pollution and water treatment