2007-02-23 22:32:05 · 4 answers · asked by harold 1 in Science & Mathematics ➔ Earth Sciences & Geology
Sea level rises and lowers once in a day. One time in close to morning it lowers (ebb tide) and once in the evening it raises (high tide). This is due to the lunar gravitational pull (moon's gravity).
The tides vary depending on the phases of the moon. During the new moon and full moon nights the tide levels are the highest. They reduce when the moon is in waning or waxing phase.
Tsunamis that happen around new moon nights or full moon nights are more dangerous than on other nights.
2007-02-23 22:36:38 · answer #1 · answered by Tiger Tracks 6 · 0⤊ 1⤋
Sorry, I have to correct Raj. he isn't even close, apart from th egravity bit.
the influence of the moon's gravity causes a bulge in the oceans. It stays still, and the earth rotates through it, so the tide doesn't acually "go in and out" at all. There is a corresponding bulge (but not as big) on the opposite side of the Earth which accounts for the two tides a day. There are not high tides morning and evening. They move forward about an hour a day.
Yes, following the lunar cycle, you get spring(higher tides) just after the full and new moons. That is because at those times the moon and sun are in alignment so the fravitational effect is greater,
Tsunamis have NOTHING to do with tides. They are caused by earthquakes at sea. The phase of the moon will not affect them
2007-02-23 22:43:03 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Tides are caused by the action of gravity from the Sun and the Moon on large bodies of water.
As the Earth, Sun and Moon change position relative to each other (i.e. the Earth's daily rotation, the orbit of the Moon around the Earth) the net gravitational force on the Earth changes. This causes a slight deformation in the shape of the Earth (think of a sheet of rubber which you pull one way and then the other) but because the Earth is pretty rigid, this effect isn't that noticeable to us. However, the water in our oceans and seas is fairly mobile and it flows towards the sources of gravitational attraction (in effect flowing "downhill") in order to minimise its potential energy.
This is what we see with the tides. Have a look at the link below.
2007-02-23 22:41:30 · answer #3 · answered by davidbgreensmith 4 · 1⤊ 0⤋
waves that are big,a bit,,TOO big
2007-02-23 22:40:42 · answer #4 · answered by Anonymous · 0⤊ 1⤋