First of all, we all know that the moon is harmed by the gravity of the earth, while meteorites in space are not harmed by the gravity of the earth, so there is no definite orientation in the whole operation process, and it is very easy to collide with the moon or even the earth. When a meteorite collides with the earth, the earth's atmosphere will ignite the meteorite and turn it into rubble and embers. Falling into the air does little harm to microorganisms on the earth, and 7 1% of the total area of the earth is water, so it is more likely to fall into the ocean.
The appearance of the moon was not maintained, and meteorites collided with the moon immediately, so many craters appeared on the surface of the moon. Small meteorites are likely to turn into powder and stay on the moon after colliding with the moon. After colliding with a big meteorite, they are likely to leave immediately because they have no power to manipulate them. This is why there are many craters on the moon.
There are as many floating dust on the moon as craters. When a meteorite hits the moon, an explosion will happen. The dust left by the explosion will attach to the moon because of the slight force of the moon. When American astronauts walked on the moon, a lot of dust was absorbed on the spacesuit in a short time. This kind of dust contains metal ions, which leads to electrostatic adsorption of spacesuits. And these dust are all left by the collision between meteorites and the moon.
Compared with other planets, the distance between the earth and the sun is relatively close, so the earth is very vulnerable to meteorites in space. However, because the moon closely surrounds the earth and keeps moving, it protects the earth from the impact of meteorites to a certain extent and plays a role in maintaining the earth. But this doesn't mean that meteorites can't enter the earth. There are also large and medium-sized craters on the earth, but there are few. The key point is that meteorites explode because of mutual tolerance when they collide, and the volume of meteorites after the explosion has already become very small.