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Unformatted text preview: Chapter 10 - Tides 19/03/2008 15:50:00 ← Definitions • Tides—periodic, short-term changes in the height of the ocean surface at a particular place, caused by a combination of the gravitational force of the moon and sun and the motion of the Earth • Forced waves—waves that are always subjected to the forces that cause them • Free waves—waves that are no longer being acted upon by the force that created them and do not require a maintaining force to remain in motion • Equilibrium theory of tides—proposed by Newton; the theory that assumes that the ocean conforms instantly to the forces affecting the position of its surface; the ocean surface is presumed always to be in equilibrium with the forces acting on it • High tides—the bulges caused by planet-sized waves • Low tides—the troughs caused by planet-sized waves • Lunar tides—tides caused by gravitational and inertial interaction of the moon and Earth, which complete their cycle in a tidal, or lunar, day (24 h 50 m) • Solar tides—smaller tides caused by the gravitational and inertial interaction...
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- Spring '08
- Neap Tides, Tide, low tides, high tides