The average depth of the largest ocean is
In our body, percentage of water is
An addition of small dose of chlorine gas to the filtered water is known as
Water can be kept pure if we throw
Fish in the ponds and lakes die because the algae
Huge strainers are used to
Skin diseases, eye infections and diarrhea are the examples of
The process in which water is passed through filter beds of sand and gravel to remove smaller particles of dust is called
The sea which joins the ocean is
Desalination plant is very expensive because it
Fluoride is also added to water, which helps in preventing
The tanks that supply water to towns are built at
When algae grows on the surface of water, it prevents
The percentage of salty water is
As compare to hose for car washing, bucketing uses
Polar ice caps are found near the
Oil can be poison for
The poison gets more concentrated as it moves through
The largest ocean on earth is
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