The Universe is a single system that consists of everything that physically exists. The basic principles of the Universe, such as the conservation of mass, the conservation of energy, and the laws of gravity,

Question

anonymous · Answer

A.are the same throughout the entire Universe.
B. change completely every hundred million years.
C. are never constant throughout any single system.
D. differ greatly between single solar systems

anonymous · Answer

are the same throughout the entire Universe.