As we all know, the moon is very important to the earth. We can even say without the moon, there would be no human. So, have you ever thought about what the earth would be like if the moon never appeared? Let’s go down with Xiaobian!
Without the moon, the earth would be smaller
On the origin of the moon, the big collision hypothesis is more convincing. Although this is a hypothesis, it is based on a lot of evidence.
4.5 billion years ago, a planet about the size of Mars, named “Theia”, hit the earth. As a result, the iron core of Theia sank into the young core of the earth, and the earth’s mantle also captured the mantle of Theia. However, a large part of Theia and earth’s mantle was thrown into orbit around the earth because of this collision, and these materials soon fused, so the moon was formed.
Without this big impact event, the moon would not have formed, and the earth would not have been able to absorb more material, so the earth would have been smaller and the core would have been colder.
If there were no moon, the earth would become an ocean world
As we all know, the earth is divided into three parts: the crust, the mantle and the core. The core is the most central part of the earth, and its temperature is also very high. However, without the moon, the temperature of the earth’s core would be lower, which would affect the plate tectonics, thus reducing the formation of mountains and basins, and eventually making the earth a world surrounded by oceans.
Without the moon, the earth’s magnetic field would increase
As we all know, an earth day is 24 hours, because it takes 24 hours for the earth to rotate once. One billion years ago, the speed of the earth’s rotation was faster than it is now. Some scientists estimated that it would take about 10 hours for the earth to rotate once at that time.
And because of the moon, there is gravity between the earth and the moon, which leads to the tide phenomenon on the earth (in fact, the gravity of the sun also has a little influence on the tide on the earth, but the influence of the moon is the main one).
The speed of the earth’s rotation is much faster than that of the moon’s rotation, so this directly leads to the friction between the sea water in the tidal process, which consumes the earth’s kinetic energy. The loss of kinetic energy will be lost in the form of heat, so the speed of the earth’s rotation begins to slow down.
If there is no moon, the earth will lose the tidal effect of the moon, the earth’s rotation speed will not slow down, but will speed up, the alternation time between day and night will become shorter, even one circle in a few hours, and the intensity of the magnetic field will be greatly increased.
Without the moon, the earth’s climate would be very changeable
If there is no moon, there will be faster rotation speed, which means that the earth will have more extreme weather, and without the stability of the moon, the earth will swing back and forth, which will make some areas of the earth repeatedly in the harsh environment of extreme heat and cold.
Without the moon, life on earth would be less diverse
If there is no moon, the earth’s magnetic field will increase, which will reduce the invasion of cosmic rays to the earth, which will reduce the probability of mutation of life genes. In this case, there can only be some marine microorganisms on the earth, not the vibrant world now.
Therefore, the appearance of the moon is very important in the evolution of life on earth. We want to thank the moon, because the moon has us.
Do you have any other ideas about the moon? Welcome to comment area.