Why does the sea go low and the tide Why does the sea go up and down

The rise and fall of sea water is related to the gravitational pull of the moon, and the sea water is attracted by the moon and has high and low tides. Because the points on the earth's surface are different from the moon, the gravitational force is different, and the gravitational force of the place facing the moon is larger, and the sea water will expand outward; Although the gravitational pull on the place with its back to the moon is small, the centrifugal force of the Earth itself becomes larger, so it also expands. At this time, the oceans on the earth's surface have high tides with rising water levels and low water levels.

Due to the rotation of the Earth, the phenomenon of rising water levels will periodically propagate to the east and west, and of course the gravitational pull of the sun will also have an effect on the oceans, but the effect is much smaller than that of the moon. In general, the main cause of the fluctuation of sea water is the combined force of the gravitational pull of the moon and the centrifugal force of the earth.

Analysis of the principle of sea water fluctuations.

To put it simply, the distance between the moon and the earth is too far, and when the sea water is just facing the moon, under the action of the tidal force produced by the moon on the earth, the force at this time is the largest, so the phenomenon of sea water ** will occur, and when the sea water is not facing the moon, but obliquely facing the moon, the sea water will be under the action of the tidal force, and the phenomenon of sea water withdrawing will occur, which is the low tide we see.

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Low tide time = (lunar date - 15).

6:48 a.m.

It's hard to say, but one thing is for sure: the high tides and low tides are due to the moon.

Gravity changes, so when the moon is near, the tide will rise, and when the moon is far away, the tide will ebb.

The high tide and low tide of the sea are caused by the gravitational pull of the sun and the moon, and the main effect is the gravitational pull of the moon. The high tide and low tide of the sea is a natural phenomenon. At high tide, the sea rolls in waves**, the scene is spectacular, and at low tide, the water quietly recedes and re-emerges on the beach, with high and low tides usually occurring twice a day.

"Tide" is the current state of the rise and fall of the sea during the day, and the rise and fall occurs at night is called "tide", so people are also collectively called tides. In ancient Chinese books, it is said that "the water of the sea is born as a tide, and the evening is born as a tide". Between high tide and low tide, there is a period of time when the water level does not rise or fall, which is called flat tide.

The gravitational force of the Moon causes not only the tides of the ocean, but also the atmospheric tides of the atmosphere. However, the movement of the atmosphere is relatively small, so I did not feel it. At the same time, part of the earth's interior is liquid, and tides are also generated in the earth's interior, which is why some people believe that the tides in the earth's interior induce **.

The high and low tides of the sea are caused by the gravitational pull of the moon and the sun on the earth and the influence of the earth's rotation.

The gravitational pull of the moon and the sun on the earth creates a tidal force that pulls and squeezes the water of the sea, causing the water to change in height. When the Moon and the Sun are on the same side of the Earth, their gravitational pull superimposes, forming a relatively strong gravitational pull, causing the sea to move in the direction of the Moon and the Sun, forming a high tide. When the Moon and Sun are on opposite sides of the Earth, their gravitational pull cancels each other out, and the sea flows to the middle, creating a high tide of ebb.

In addition, the rotation of the earth itself also has an effect on the tides. Since the speed of the Earth's rotation is constant, and the Moon's orbit around the Earth is elliptical, the gravitational pull on the Moon is different at different locations, which causes the periodicity and amplitude of the tides to change.

In summary, the high tide and low tide of sea water are formed by the combined effect of the gravitational pull of the moon and the sun on the earth and the influence of the earth's rotation.

Why does the sea rise and fall?

The high and low tides of the sea are caused by the gravitational pull of the Moon and the Sun on the Earth. When the earth is affected by the gravitational pull of the moon and the sun, the sea water will continue to **, and the area with the most sea water will form a high tide; The low tide is called low tide because most of the sea water flows close to the sun or the moon, causing the distant sea water to flow to a lower place due to the action of the earth's internal forces. In addition, the relative position of the Sun and Moon also affects the size and position of the tides.

Tides are beneficial to the exchange and replacement of the marine environment, and the spike hole promotes the flow of seawater.