What controls the tide of the sea?

Answer 1

They are controlled by the sun and the moon. Sometimes Earth gets closer to sun because of its elliptic track. When the sun is closer, it's gravity causes a tide on the side closest to the sun and on the opposite side.

Answer 2

Many things, but the single greatest influence is the location of the Moon, or more precisely, the Moon's gravity. To simplify what is really a very complicated series of influences, you could say that in general the side of the Earth facing the Moon feels its gravity the most--because the strength of gravity decreases the farther away you get from its source--so water on Earth bulges towards the Moon, creating a high tide. The side of the Earth facing away from the Moon feels its gravity the least--it's furthest away from the Moon--so water bulges away creating a second high tide. As water moves toward the Moon on one side of the Earth and away from the Moon on the opposite side, it moves away from those places in between these two locations, thus creating low tides 90 degrees away from the high tides.

There are other factors that also affect tides, but the Moon's gravity has the greatest effect.

Answer 3

The Moon's gravity controls the tides, together with that of the Sun. The oceans, being fluid, can move much more easily than the land, so they bulge outwards towards an external gravitational pull. In this case the direction of that pull is determined by the resultant of the Sun's and the Moon's gravity. As the Earth rotates, the parts of the planet directly under that bulge experience a high tide. Directly opposite that point, the Sun/Moon pull is weakest, and there is least tendency for the water to move. This results in another bulge, so there are actually two high tides a day. The actual height of the tides varies because the Moon's orbit means that the angle between it and the Sun changes. This means that we get the very highest tides (spring tides) when the Sun and Moon are in line and pulling the same way, which occurs at new Moon. The lowest high tides, i.e. those with the smallest difference between high and low tide occur when the Sun and Moon are opposite each other, i.e. at full Moon. These are called neap tides. The actual times and height of the tide are affected by the land masses and so you need to consult local tide tables to find them. There are some very good animations on this link: http://scijinks.jpl.NASA.gov/tides/

Answer 4

Gravitational pull of the Moon makes the tides ebb and flow.

Answer 5

the moon is the main factor behind the oceans tides.

Answer 6

Gravity on the Moon pulls the sea and causes the tide to ebb and flow.

Answer 7

The gravitational pull, and specifically the tidal forces, from the Moon and Sun. The shape of the ocean floor also has a significant impact.

Answer 8

Tides are controlled by the sea level

Answer 9

its gravity pulls on the water

Answer 10

Technically gravity controls the tides the water on earth is pulled towards the moon as it revolves around the earth, which is why the water isn’t pulled in only the same direction