1. Ocean: An ocean is large water mass covering maximum area of water surface on the earth.
2. Sea:
A small water mass separated from ocean is called sea.
3. Bay:
When the water of ocean is separated and is surrounded by nearby land mass, it is called a bay.
4.Gulf:
A small, tapering water mass formed by the ocean massater, upto the coast is called a gulf.
5. Strait:
A long, narrow belt of ocean water connecting tow large water masses is called strait.
6. River:
A river is a natural flow of freshwater from the slopes of higher areas towards lower areas.
7. Lake:
A water mass accumulated in a lower (depression) area on the surface of the earth is called lake.
8. Wells:
Wells are there where there is abundant water in the interior of the earth.
9. Artesian wells:
Artesian wells are there where the base of the water is deep.
10. Ground water:
Rain water is accumulated in the pervious rocks through joints, holes, fissures, or cracks in the rock strata, below the surface of earth. This water is called ground water.
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