Indeed there are similarities! We know that the Earth is layered on the inside, similar to an onion, and has a crust(inner & outer), the mantle, and the core(inner & outer). In other words, the inside of the Earth is solid metal, then an almost liquid layer, followed by a hard top layer so it’s not quite like an onion, but you get the layering idea. Mantle convection (the movement of the almost liquid area) is what drives plate tectonics, the movement of plates in the crust. Imagine a batch of candlewax that is almost cooling so that the top most layer gets solid while beneath it, the candlewax is still molten — except that the wax is convecting and so the top layers move after they cool (while cracking and changing shape). Well, that’s the Earth.
The Moon also is layered! The moon has a hard core, almost liquid outer layer, and hard (but thin) crust. One of my professors does some research on the Moon (and Mars) and he found that there was also evidence of plate tectonics activity on the Moon a long time ago. The Moon also rotates, as the Earth does.
So although they two are not completely identical, there are striking similarities!
Absolutely! This is all because the moon was once a part of the Earth. Research has shown that in the early formation of the Earth, our planet was impacted by an object larger than the size of Mars. When this happened, it catapulted a large piece of the still forming (and therefore ‘soft’) Earth away from its source. Out here and the now new moon cooled and formed on its own, becoming caught in the Earth’s orbit.
Because of this thre are many similarities between the two. In addition to khathyhoang, the rocks studied from the moon have been estimated to be around the same age as Earth.
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