Answe: Metamorphic rocks are rocks that have been changed from one form, such as igneous or sedimentary, to another. This can occur when a given rock is exposed to intense heat, pressure, or hot fluids. ... As materials crystallize, the atoms form a structure that is most stable at the temperature and pressure of the environment.
After Eris was discovered, they had to decide whether Eris was a planet or not. If they decided it wasn't a planet, they had to also decide whether Pluto should be counted as a planet since Eris and Pluto were quite similar. They were the same size, and they were both part of the Kuiper Belt.
There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid.
