1
They are the movement of large masses of ocean water in the same direction.
2
All the water on Earth.
3
They are the rise and fall of the water\'s surface.
4
It is found in oceans, seas, rivers and lakes.
5
They are the rise and fall of the sea level twice a day.
6
It is found in the polar regions and on mountains.
7
It is found in the atmosphere
