When Carlos opens his freezer, frozen water on the surface of a frozen steak into water vapor. The water vapor on the cold surface of a freezer and creates frost.

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)