Physical is to chemical as size is to ???

The rules of engagement (roe) working group is often used to (select all that apply.)

Which statement best describes the flow of energy in this scenario

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)