The principle that the geologic processes that we see today have occurred throughout earth's history is called uniformitarianism gradualism catastrophism volcanism

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Wegeners theory of continental drift states that the continents have changed throughout history while the theory of plate tectonics

Which type of seismic waves are confined at the surface