What are the tides related to, and what are they related to the tides? （）

As the saying goes, the tide rises and falls, and the back wave pushes the front wave, so what is the law of the tide and what does it have to do with it?

Yu Daoan (also known as Yu Jing), an ancient Chinese (Song Dynasty) astronomer, wrote in his book "Preface to the Sea Tide": "The sun enters the sea and the tide is born, and the moon leaves the sun and the tide is large. "The moon goes to the sun and its tide is big, and the tide begins to be slight when it is combined", "the rise and fall of the tide, the sea is not increasing or decreasing, and the moon is coming, then it will follow."

The Eastern Han Dynasty materialist philosopher Wang Chong (also known as Wang Zhongren) wrote in "On Balance": "The rise of the waves also rises and falls with the moon. Both point to the fact that the tides are related to the Moon.

It was not until the 80s of the 17th century that the British scientist Newton discovered the law of gravitation and proposed that the tides were caused by the attraction of the moon and the sun to seawater, thus systematically and scientifically explaining the causes of the tides.

Tide is a natural phenomenon in coastal areas, refers to the change in the vertical direction of the seawater, in ancient times, the tide during the day was called "tide", and the tide at night was "tide", collectively called "tide". The occurrence of tides is related to the sun and the moon. Tidal phenomena are the periodic rise and fall of the water surface of the ocean under the gravitational pull of the moon and solar tides.

<> tidal phenomenon also corresponds to the traditional lunar calendar in China. On the first day of the lunar month, the sun and the moon have the greatest gravitational force on the side of the earth, so they will cause a large tide; On the fifteenth or sixteenth day of the lunar month, the sun and the moon are on opposite sides of the earth, and the gravitational force of the sun and the moon will also cause a high tide. When the moon phase is the first and last quarter, that is, around the 8th and 23rd of the lunar calendar, the gravitational force of the sun and the tidal force of the moon cancel out part of each other, so only small tides occur. Therefore, there is a proverb in the agricultural proverb "the beginning."

1. The fifteenth rising tide is at the beginning.

8. 23. See the beach everywhere".

Tides are related to the gravitational pull between the Moon and the Sun on the Earth. Tide refers to the periodic movement of seawater under the gravitational force of celestial bodies (mainly the moon and the sun), and is a phenomenon of periodic fluctuations and fluctuations of seawater formed under the gravitational force of the moon and the sun.

The elastic-plastic deformation of the solid earth caused by the gravitational force of the sun and the moon is called the solid tide, referred to as the solid tide or ground tide. The periodic rise, fall, advance and retreat of the sea surface caused by the gravitational force of the sun and the moon are called ocean tides, referred to as ocean tides.

The Moon is closer to the Earth than the Sun, and the ratio of the gravitational force of the Moon to the Sun is 11:5. For the oceans, the solar tides are more pronounced than the solar tides. The driving force of earth tides, ocean tides and air tides is caused by the different gravitational forces of the sun and the moon on various parts of the earth, and the three affect each other.

The tidal phenomenon is dominated by the moon, and the summer calendar, which is based on the changes in the phases of the moon, is a guide to maritime activities in ancient times. The Moon is attractive to the Earth's seawater, and the points on the Earth's surface are different from the Moon, and the place facing the Moon is gravitationally strong, and the seawater expands outward; The place with the back to the moon is less gravitational, and the centrifugal force becomes larger, and the sea water expands to the place with the back to the moon under the action of centrifugal force, and the tide will also occur.

What is it related to the tides? () Bucket line round.

a.Space Sunset.

b.The stars are like stars.

c.Moon. d.Wind.

Correct answer: c

Tides are caused by the Earth-Moon attraction. The Earth-Moon attraction causes periodic movements and changes in the Earth's lithosphere, hydrosphere, and atmosphere, known as "tides", which are divided into geotidal, oceanic, and atmospheric tides.

The vast majority of water is seawater, and the gravitational pull of the sun and the moon will rise and fall, because the earth and the moon are constantly moving, the relative position of the earth, the moon and the sun is changing periodically, so the gravitational force is also changing periodically.

Water also rotates with the rotation of the earth, and the rotating objects are subjected to a force. In ancient times, the water gushing in the river during the day was called the tide, and the tide at night was called the tide, and it was customary to call the vertical rise and fall of the sea surface as the tide, which is a natural phenomenon in the coastal area.