"As galaxies move farther apart from each other, they move faster. A galaxy’s speed is proportional to its distance." Is this an example of a law or a theory?

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods