Q.

Which of the following is the best definition of 'Tides' ? [SBI PO 1991]

A. A powerful movement of the ocean which proceed constantly in a definite direction
B. A great circulatory movement of sea water caused by difference in density of sea water
C. A periodic rise and fall of sea water caused by the gravitational force of moon and sun on earth
D. A wind and pressure system having a low pressure in centre and circular wind motion
Answer» C. A periodic rise and fall of sea water caused by the gravitational force of moon and sun on earth
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