Water consists of hydrogen and oxygen in the ratio of ______ by volume
1:1
1:2
2:1
3:1
In early winter mornings, we can see drops of water on the blades of grass. This is because of
Photosynthesis
Transpiration
Condensation
Water cycle
The process of obtaining salt from sea water involves
Evaporation
Sublimation
None
Why is water scarcity increasing day by day?
Water cycle has stopped functioning
The total amount of water of water on earth has decreased
The amount of potable water is decreasing because of overusage
Due to increasing frequency of floods and droughts
Which of the following is potable water
A glass of water fit for drinking
Water in a pot
Sea water
Water with bacteria and chemicals
Which of the following is polluted by man or factories ?
Ponds
Rivers
Ground water
All
The melting point of ice is
370 c
40 c
1000 c
Rain water harvesting is
Storing ground water by not using water from the well
Stop growing crops to save water
Allowing water to go into rivers and lakes
Collecting rainwater and storing it for later use
The density of water is
0.1 g/cm3
1 g/cm3
100 g/cm3
1 kg/m3
Find the wrong statement
Water evaporates from plants, animals and oceans
Animals living in the water are not harmed during floods
There is no vegetation during draughts
Water available for use is very limited
