What is flow or flood?
The time between the low tide and high tide, when the tide is rising, is called the flow or flood.
How can velocity of a wave be determined ?
The velocity of a wave can be determined as follows :
Every wave has a wave length, velocity, height and wave period. The distance between two successive crests or two successive troughs is called wave length. The time taken by a wave length to pass a fixed point is known as the wave period. The vertical distances between a trough and crest is the wave height.
Motion of Waves
Discuss the characteristics of ocean currents.
Characteristics of ocean currents:
1. Permanent winds or prevailing winds, 2. Variation in temperature, 3. The rotation of the earth, 4. Variation in salinity, 5. The direction of land masses.
The prevailing winds such as trade winds (westerlies) exert one way drag on sea surfaces over vast expanses of oceans. This drag produces a system of drift system.
Difference in density can also set currents in motion and these are described as thermocline currents.
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