Water gets polluted by:
Dumping garbage in water bodies
Smoke from vehicles and factories
Chemicals getting thrown into the soil
Burning garbage outdoors
Which of the following is the purest form of water?
River water
Rain water
Sea water
Pond water
Chlorine is added to water to:
increase germs
remove germs
improve its taste
coagulate impurities
What is RWH?
Rain Water Harvesting
Rain Water Houses
Regional Water Harvesting
Rain Water Harbour
What is essential for the growth of a plant?
Water
Chemicals
Nitrogen
Water vapour
What percentage of Earth’s surface is covered with water?
1/4 th
2/3 rd
1/3 rd
3/4 th
The temperature at which liquid water changes into ice is called :
Melting point
Freezing point
Boiling point
Drying point
Water boils at:
10o C
100o C
1000o C
0o C
Which is present in unlimited quantity in nature ?
Inexhaustible resources
Exhaustible resources
Renewable resources
Non renewable resources
The process of water changing into vapour is called:
Evaporation
Condensation
Precipitation
Collection
