The planet we live on is more than 70 % of the ocean area. Deep in the ocean, there are countless secrets.

Although we have explored space for many years, and even the detectors launched by humans have reached the edge of the solar system, our exploration of the ocean has only been for decades.

For a while, scientists were confused, and every year, hundreds of millions of tons of sediment flowed into the sea through the river. But why did the sea not be filled?

In fact, our understanding of the ocean is still too shallow. There are countless gully depths in the ocean, these are linked to each other. A large amount of sediment was pulled away by these pipes -like a gully, sinking into the underground in the slow - crustal activity.

Our exploration and viewing of beauty have always existed. Because of the different feelings of beauty, our views on beauty are different.

The sea seems to be very beautiful to many people, and many people like to go to see the sea in their spare time. Looking at the tide of the sea, our mood will be particularly happy and relaxed.

Have you ever wondered why there are high and low tides in the sea? And where does the ebb water go back?

As we all know, the earth has gravity. Through the existence of experiments and the third laws of Capeler, Newton has derived the law of gravitational gravity.

In other words, everything on the earth is attached to the surface of the earth because of the existence of gravity. No matter how the earth rotates, things on the earth will not fall, which means that the sea is still on the earth.

The tide of the earth is mainly influenced by the moon. When the sea on the earth is on the moon, the gravity at this time is the largest, and the seawater will rise.

We all know that sea water is salty and cannot be drink. This is because seawater contains a large number of minerals, such as salt. The main component of salt is sodium chloride.

In addition, there is a small amount of magnesium chloride, potassium sulfate, calcium carbonate, etc. in the seawater. It is these minerals that make the seawater bitter and astringent, which cannot be used at all.

Curiously, why is seawater salty? Where do these salt come from? Some experts and scholars believe that seawater has some salt itself. In addition, a large amount of water vapor evaporated in the ocean drifted into land and caused rainfall.

This rainwater gathered into a river, and the river continued to wash the land and inject the salt into the sea, so the seawater became very salty.

Some people will ask, will the seawater become saltier and saltier over time? Scientists point out that although there is more and more salt in the ocean, chemical reactions will occur with various substances in the seawater, forming a large number of compounds sinking into the bottom of the sea.

These large compounds are gathered together to form common iron ore, magnesium ore, aluminum ore, etc. Over time, a cycle reaction will occur in the sea, and the salt in the seawater can be balanced.

So for so many years, the saltiness of sea water has only changed slightly, and it can be ignored.