Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA)What was this particular time period called? Why is this time period not really considered a part of Earth’s geologic history?
am not if you don't like my answer then so be it I'm just trying to help so don't accuse me of plagiarism.
whoa
The earth is NOT solid, even now. We live on a thin crust under which is a molten mass of liquid rock several thousand miles thick. I do not think there are ANY truly solid planets in our solar system. We're not 100% sure of course, since we have not actually been to any of them
What about the other parts of the question?
Perhaps you mean Hadean, when the planets of the solar system were just forming out of dust and particles. There were no solid rocks or anything yet, so you could hardly call it geologic.
The thing about gravity is that if two specks of dust are drifting around the sun alongside each other, they are pulled together by their own gravitational fields. The more particles get pulled together, the bigger the particles and the bigger the forces. Eventually the particles look more like a cloud than individual particles, then a few million years later you have something that is liquid, or perhaps solid.