Why do the oceans ebb and flow? What causes it?

It is caused by the action of the moon. Although the moon is small in size and has a small gravitational force, it can play a certain role in attracting the seawater on the earth, and when the moon revolves around the earth, it brings the ebb and flow of the earth's oceans.

The ebb and flow of the oceans are created by the gravitational forces of the Moon and the Sun. Under the action of gravity, the ocean will move towards the land to form tides, and the tides are conducive to the exchange of the marine environment.

Although the mass of the moon is smaller than that of the earth, its gravitational attraction on the earth will produce periodic tidal phenomena, that is, the water body facing the moon will be attracted by the moon, and the volume will become larger (the sea level will rise), and the volume of the other side will become smaller (the sea level will fall), which forms a periodic tide.

In one day, except for the north and south poles and individual regions, the tides rise and fall twice in each day, each time for 12 hours and 25 minutes, twice a day, a total of 24 hours and 50 minutes, so the time of tide rise and fall is delayed by 50 minutes every day. It is precisely because of such fluctuations that the seawater can be temporarily replenished by the water that does not rise in other places when the tide rises in one place, thus forming a tidal current and facilitating the exchange of the seawater environment. When the tide rises, it's not that there's more water, but because the ocean water in the offshore sea moves towards the land in waves under the gravitational influence of the moon to form the tides, so that you can see the tide on land as if the sea is rising.

Why do the oceans ebb and flow, and how are these tidal phenomena formed?

Because it is affected by the gravitational pull of the sun and the moon, the phenomenon of high tide and low tide is formed. The principle is that when the ocean faces the moon, it is affected by the gravitational pull of the moon, so the phenomenon of high tide is formed.

The ebb and flow of the tide of the sea is a natural phenomenon, and the tides are related to the movement of the earth. Tides are created due to gravitational changes between the Moon and the Earth.

Because the Earth is affected by the gravitational pull of the Moon, the Moon forms high tides and low tides in the process of orbiting the Earth.

Because the earth and the moon are constantly moving, the relative positions of the earth, the moon and the sun are changing periodically, so the gravitational force is also changing periodically, which makes the tidal phenomenon occur periodically, which is the reason for the ebb and flow of the tide.

Seawater also rotates with the rotation of the Earth, and the rotating objects are subjected to centrifugal force, which makes them have a tendency to leave the center of rotation: at the same time, seawater is also attracted by the Moon, the Sun and other celestial bodies, because the Moon is closest to the Earth, so the attraction of the Moon is greater. In this way, the seawater forms a tidal attraction under the combined action of these two forces.

The Moon, commonly known as the Moon, also known as Taiyin and Xuantu in ancient times, is the only natural satellite of the Earth and the fifth largest satellite in the solar system.

The sun is the central body of the solar system and occupies the overall mass of the solar system.

Earth (English name: earth; Latin: Terra) is the third closest planet to the Sun and the only known object that harbors and supports life.

It occurs because of the gravitational force of celestial bodies.

Because of the gravitational pull of the moon and the sunBecause of the gravitational pull of the moon and the sun.

At all times, seawater is in equilibrium with the horizontal components of the shadow tidal forces, gravity, and pressure gradient forces. That is to say, when the sea water is affected by the horizontal force component of the tidal force, in order to maintain the original equilibrium period, the sea level must be inclined relative to the original stationary sea surface, and at the horizontal component of the tidal force and the bifurcation point at the north and south ends, the accumulation and loss of sea water is the most, which also promotes the formation of tidal phenomena. Of course, some people say that the essential cause of the formation of tides is not the gravitational effect of the moon, but the transformation of the celestial mass center, but the current discussion on this aspect has not reached a unified conclusion, so people still generally regard the tide theory analyzed in Newton's works as the mainstream.

After low tide, high tides can form elsewhere on the surface of the sea. The tidal phenomenon is a natural phenomenon in coastal areas, which is related to both the Sun and the Moon, and is mainly caused by the gravitational pull of the Moon. The moon revolves around the earth all the time, so no matter what the moon turns to, the waters in the ocean will converge.

The high tide and low tide of sea water are mainly related to the gravitational attraction of the moon and the sun, and the earth is affected by the gravitational force of the sun and the moon, and the low tide and high tide will occur; The water comes from the place where the grass falls, and the sea water rises and falls, so at high tide the water flows over at low tide.

The high and low tides of the ocean are caused by the gravitational pull of the moon on the seawater. It came from the place where the tide was low.

The tidal phenomenon of the Earth's oceans is mainly caused by the Moon, and the Moon's gravitational pull will slightly "suck" the water of the Earth's side facing the Moon away from the Earth's surface, so that a high tide is formed here. In this case, the water from other ocean areas of the planet will rush in, and at the same time, the areas that have lost some of their water will form a low tide, and the low tide water will actually go to the high tide area of the ocean.

Mainly because of the law of the sea, there will be tidal phenomena, which will cause such a situation according to the gravitational pull of the sun and the moon. The water at high tide is exchanged because the water on Earth is affected by gravity.

The reason why the ocean rises and goes down is actually related to the gravitational pull of the moon and the sun, which is caused by them, which is a very normal phenomenon. The water at high tide generally comes from the sea.

It is the moon and the sun that are responsible for such turbulence in the sea. The Earth's gravitational pull on the surface of the sea is millions of times greater than that of the Moon and the Sun. So the sea water stays on the earth without being sucked away by the moon and the sun.

But the moon and the sun, though far away from the ocean, attract the ocean like a giant magnet to the iron, and it can suck up the sea and cause the tides.

The time and height of the rise and fall have periodic changes, so people call this phenomenon of sea water rise and fall tides. With the rise and fall of seawater and the rise and fall of water level, there is a horizontal flow of seawater, and this phenomenon of seawater flow is called tidal current.

The ebb and flow of the tide is caused by the gravitational pull of the moon and the sun on the seawater, the sea water at high tide is from the sea water from the other hemisphere, and the sea water at low tide goes to the sea water from the other hemisphere.

The ebb and flow of the oceans is caused by the gravitational pull of the Moon. The sea water at high tide comes from the sea at low tide, and the sea water at low tide comes from the sea at high tide.

It is mainly the gravitational pull of the moon that causes the tide to ebb and flow, and the sea water comes from the sea at high tide and retreats into the sea at low tide.

Five Meanings of Tides.

1. The tides and the earth's self-transformation are slow.

Due to the viscous force and the friction of seawater with the land and seabed when the layers of seawater move relatively, tides have a braking effect on the Earth's rotation, making the Earth's rotation gradually slower.

Studies have shown that the Earth's rotation cycle is 1-2 milliseconds longer every century, and if this slowing effect is applied to a longer time span, the number of days in a year dating back to 370 million years ago (Devonian) is about 400 days, which is consistent with the number of growth rings of fossilized corals in the Devonian period (coral rings grow one ring a day).

2. The moon always faces us in the same way.

It has been discovered that the moon always faces us in the same way, and the other side of it is not visible to us on Earth. This is due to the fact that the period of rotation of the Moon happens to be equal to the period of the Moon's rotation around the Earth, and the two periods are the same as the result of the long-term action of the tides. It is calculated that the tidal force of the Earth against the Moon is a multiple of the tidal force of the Moon on the Earth.

Such a strong tidal force, combined with the fact that the Moon's moment of inertia is much smaller than that of the Earth, makes the slowing down of the rotation caused by the tides particularly significant for the Moon. It is conceivable that the early moon had a large rotation speed, which gradually slowed down the moon's rotation under the action of tides.

Finally, the period of rotation of the Moon and the period of rotation of the Moon around the Earth are equal, at this time, the tides of the Moon disappear and the rotation period of the Moon does not change anymore, so the Moon today always faces the Earth with the same side.

3. The increase in the distance between the tide and the moon and the earth.

Tides slow down the Earth's rotation, resulting in a decrease in the Earth's angular momentum. Since the total angular momentum of the Earth-January system should remain unchanged, and the direction of the Moon's rotation around the Earth is basically the same as the direction of the Earth's rotation, the decrease of the Earth's angular momentum will inevitably increase the angular momentum of the Moon-Earth-Earth-January system's center of mass to keep the total angular momentum of the Earth-January system conserved.

The practical effect of this effect is a slow increase in the distance between the Moon and the Earth, which has been observed moving away from the Earth at a rate of centimeters per year. The slow movement of the Moon away from the Earth can also be explained by the acceleration of the Moon formed by the tidal bulge of the Earth.

4. The utilization of tidal energy is mainly power generation.

Tidal power generation is to use the favorable terrain such as bays and estuaries, build water embankments, form reservoirs, in order to store a large amount of seawater, and build hydropower plants in or next to the dam to generate electricity through hydro-generator sets.

It is possible to extract energy from the tides only when there are high tides, energy concentration, and in places where the geographical conditions are suitable for the construction of tidal power stations. Although such sites are not everywhere, a considerable number of sites suitable for the development of tidal power stations have been selected in various countries around the world.

5. Tides have tremendous energy.

The theoretical reserves of tidal energy in the world are about 3 10 9 kw. China's coastline is tortuous, the total length is about, there are more than 6,000 large and small islands along the coast, the coastline composed of the long coast contains very rich tidal energy resources.