The rise and fall of ocean waters. There are two tides of interest to mariners: the ebb tide sailors encounter as they attempt to enter port and the flood tide they experience as they try to leave.
Periodic movement of water resulting from gravitational attraction between the earth, sun, and moon.
periodic movement (raising and lowering) of a body of water by the gravitational attraction of the moon and sun with the rotation of the earth
the rise and fall of water caused by the gravitational forces of the moon and sun.
Rising and falling motion that bodies of water follow, exhibiting daily, monthly, and yearly cycles. Ocean tides on Earth are caused by the competing gravitational pull of the Moon and Sun on different regions of the Earth.
the periodic rising and falling of the oceans resulting from lunar and solar forces acting upon the rotating earth.
The rise and fall of ocean waters produced by the gravitational pull of the moon and the sun.
the alternate rising and failing of the ocean’s surface which occurs twice in each lunar day (24 hours).
very long-period waves that move through the oceans in response to the forces exerted by the moon and sun. Tides originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the sea surface. When the highest part, or crest, of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough.
The "rising and falling" of the ocean primarily due to the motion of the moon and the sun.
The alternate rising and falling of the surface of the ocean and water bodies (such as gulfs and bays) connected with the ocean that occurs usually twice a day, and is caused by the gravitational attraction of the sun and moon occurring unequally on different parts of the Earth.
the periodic rise and fall of the ocean's surface due to the influence of the Moon's and the Sun's gravity
The constant rise and fall of the water level of the bodies of water, caused buy the sun and moon's gravitational pull.
a body of water that is affected by the gravitational pull of the moon, and consequently the sun, which affects the level of water.
periodic rise and fall of ocean waters due to gravitational pull of sun and moon, and rotation of earth.
Caused by differential gravitational attraction on a system. If a two bodies are close enough together to have a strong gravitational effect on each other (Oh Er!), then tidal forces will be manifested. The side of a system closest to the other body will feel a greater attraction to it than the middle of the system, which in turn is more attracted than the far side of the system (Inverse square law of gravity.) This means that the system will be elongated along the line towards the other object (a tidal bulge). On the Earth this is why we have tides as these forces affect our oceans. The tidal forces are not only caused by the moon, but also the sun. This is why we have spring (when the Moon and Suns forces align) and neap (When the are at 90 deg to each other) tides. So we do in fact get Spring tides twice every month (at new and full moon), not just in the spring! Tidal effects can be seen on scales much larger than the solar system. For example, galaxies are ripped apart by tidal forces when two of them have a near enough encounter.
the distortion of a body caused by the gravitational influence of another body