Which of the following is the purest form of water?
River water
Rain water
Sea water
Pond water
Which is the main source of fresh water on earth?
Oceans
Seas
Rivers
Rain
The temperature at which ice melts is called the :
Melting point
Freezing point
Boiling point
Drying point
Scarcity of water takes place due to :
Water cycle
Population explosion
Water harvesting
Flood
Which energy source can be reproduced?
Renewable
Non renewable
Non exhaustible
Non replenishable
What percentage of Earth’s surface is covered with water?
1/4 th
2/3 rd
1/3 rd
3/4 th
Animals need:
Water
Snow
Chemicals
Water vapour
Chlorine is added to water to:
increase germs
remove germs
improve its taste
coagulate impurities
The process of water changing into vapour is called:
Evaporation
Condensation
Precipitation
Collection
The temperature at which liquid water changes into ice is called :
