Why Do Tides Occur?

Answer

Tides occur because of the gravitational pull of the moon. If the moon were to stay on the exact opposite side of the sun all the time then the tides would occur twice every 24 hours. Spring tides occur during the full moon while neap tides occur during quarter moons.
Q&A Related to "Why Do Tides Occur"
The ebb and flow of tides happens because of the gravitational pull between the Earth and the Moon. The gravity exerted on the Earth causes the oceans to bulge toward the Moon and
http://www.ask.com/web-answers/Science/Nature/how_...
because of the gravitational pull of the moon it pulls the tide up or push it down --- Not just the moon. The moon along with the sun and the earth's gravitational pull itself. --
http://wiki.answers.com/Q/Why+do+tides+occur
The moon's gravity attracts the water, which leads to the tides as the moon orbits around Earth.
http://www.life123.com/parenting/education/astrono...
Tides are caused because the moon is pulling upwards on the water while the
http://www.chacha.com/question/when-do-the-lowest-...
2 Additional Answers
Tides and tidal waves occur because the moon is always trying to pull the earth towards it. The water is reacting to the gravitational pull from the moon.
Gravitational force of moon, sun, and earth combined with centrifugal force due to rotation of the earth cause movement of ocean. When moon, earth and sun align, there will be gravitational force of all these creates bigger tides.
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