Necessity of Water
Necessity of Water: Overview
This topic explains concepts such as Importance of Water, Water for Life, Water, etc.
Important Questions on Necessity of Water
What percentage of the earth's surface is covered with water?
Explain the importance of water for living organisms.
Read the passage and answer the question.
The Earth has more water than land, but most water is in the sea. This water is salty. It cannot be used for growing plants or for drinking.
Why should we use water carefully?
Choose the right word and fill in the blank.
Big portion of our body is _____. (thirst, water, life, electricity)
Choose the right word and fill in the blank.
Water is _____. (thirst, water, life, electricity)
3. About ................... drop in water content in our body causes dehydration.
If we don't drink enough water, what will happen to our body?
Calgon is the trade name of _____.(Sodium hexametaphosphate/Sodium heptametaphosphate)
Sewage is a complex mixture containing suspended solids, dead and disease-carrying bacteria, organic and _____ impurities.
The process of vaporisation does not depend upon surface.
How much part of the earth is surrounded by water?
Describe the importance and conservation of water.
Bringing water to a boil kills all the germs that may be in it.
