Q. Which of the following is the best definition of 'Tides' ? [SBI PO 1991] (Solved)
1. A powerful movement of the ocean which proceed constantly in a definite direction
2. A great circulatory movement of sea water caused by difference in density of sea water
3. A periodic rise and fall of sea water caused by the gravitational force of moon and sun on earth
4. A wind and pressure system having a low pressure in centre and circular wind motion
- c. A periodic rise and fall of sea water caused by the gravitational force of moon and sun on earth