water

4. the addition of chemicals to the sedimentation tank
5. rainwater that gets collected under the ground
6. a period of low rain
9. a substance that gets dissolved in a liquid
11. the amount of heat energy per unit mass required to raise the temperature of a liquid by 1*C
13. continuous circulation of water from the earth to the atmosphere
16. disease caused by bacterium
17. tasteless water which does not contain any minerals
19. the contamination of water by unwanted and harmful substances
20. process in which ozone is used to sterilize water

1. a solution which can not dissolve any more solute at a particular temperature
2. when it rains heavily for a number of days
3. the clear liquid that passes through the filter paper
7. water that is fit for consumption
8. helps to kill harmful microorganisms present in the water
10. process of giving off water in the form of vapor through the leaves of the plant
12. the process of adding chlorine to the water
14. a solution which can dissolve more solute at a particular temperature
15. layer the layer that does not allow liquid or gas to pass through
18. the level of water under the ground