Ocean tides
Tidal variation = regular, periodic, & predictable changes in mean sea level
Tidal range = difference between water height at high tide & water height at low tide
Tidal currents = movement of water generated by or associated with the change in mean sea level
- Flood tide - movement of water toward shore or into a restricted body of water
- Ebb tide - movement of water away from shore or out of a restricted body of water