How does the moon control the tide?

Question

when the tides change the water doesn't "go" anywhere, thats just the moon controling it, so how does the moon control the tide exactly?

Answer 1

Gravity!

The gravitation pull between the moon and the earth causes a "buldge" of water on the side of the earth facing the moon and the side opposite. The buldge or build-up of water moves as the moon orbits the earth approximately once per day. This causes approximately two buldges (high tide / low tide) per day. By the way, the Sun's gravity also affects the tides causing the height of the tide to gradually change.

Answer 2

Tidal forces in general are caused by the difference in gravitational force experienced between different parts of the same object.

When there is a large difference in the forces between the different parts (either because the object is very large or the gravitational field strength changes very rapidly with distance) then there are pulling/stretching forces experienced within the object as well as the overall gravitational attraction the pulls the centre of mass.

In the earth/moon system, there is a large distance between the side of the earth near the moon and the side farthest away. This creates a stretching force - so the earth is pulled into a sort of bulging ball shape

Of course, the oceans are free, so they also respond to this tidal force - they flow toward the point of maximum gravitational force which is the point where the moon is overhead. That's high tide!

On the far side of the earth, the solid planet has moved toward the moon but the tidal force on the water is much lower so effectively the ground falls downward - creating another high tide!

That's the very basic idea - the tides are actually very complicated and controlled by things like shape of ocean floor, funnelling in river estuaries etc. The relative orientation of the sun and moon also plays a part. But that's the gist :)

Answer 3

What Controls The Tides

Answer 4

The gravitational attraction of the moon for the earth is stronger on the side closest to the moon, so it attracts the ocean water, which is free to move, toward the sublunar point, creating a high tide. But the gravity also attracts the earth away from the ocean water on the other side, creating a high tide there as well. The earth's rotation causes the tides to move around the earth; the friction causes the earth's rotation to slow slightly, and the moon's distance from the earth to increase (presently at about an inch a year).

Answer 5

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How do the movements of the sun and the moon affect tide? The gravitational pull of the moon tugs on the surface of the ocean until its surface mounds up and outward in the direction of the moon. When the mound of water has reached its highest point it is called high tide. On the opposite side of the earth from the moon, the centrifugal force caused by the earth's rotation produces another mound of water and high tide. Between these two high tides are two flat areas on the surface of the ocean which are the low tides. Each day there are two high tides and two low tides. The time between high and low tide is a little over 6 hours and the entire tidal cycle repeats itself four times each day. The regularity of the tides corresponds to the regular orbit of the moon around the earth and the rotation of the earth as it orbits around the sun.

Answer 6

Let's start with what tides are. Tides are the times the sea level is high or low. You see, the moon has it's gravitational pull too but it doesn't affect us much except that it pulls the water. Therefore, high tides are caused when the moon is pulling the water up (usually in the night or on an eclipse or during new moons) and the low tide is caused by the moon pulling the water at another side of the earth.

Answer 7

Tides are the cyclic rising and falling of Earth's ocean surface caused by the tidal forces of the Moon and the sun acting on the oceans.

The tidal force is a secondary effect of the force of gravity and is responsible for the tides. It arises because the gravitational field is not constant across a body's diameter.

Answer 8

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RE:
How does the moon control the tide?
when the tides change the water doesn't "go" anywhere, thats just the moon controling it, so how does the moon control the tide exactly?

Answer 9

gravitational pull from the moon controls tides

Answer 10

When it is in the evening, since the moon has just started rising, the gravity pull is low.So, there will be low tide.In the midnight, especially the moon is above, the gravity pulls the water up, high tide occurs.