Which early heat source describes how the center of the Earth squeezed together to raise the internal temperature and is still a cause of internal heat today? Gravitational contraction
Bombardment by asteroids
Radioactivity
none of theses

What can happen to solar radiation when it enters earth’s atmosphere? check all that apply. it is absorbed by earth. it is reflected by clouds. it is reflected by glacial ice. it is condensed into visible light. it is amplified by water molecules.