Which components can be found in both comparative and experimental investigations, but are never found in descriptive investigations? check all that apply. - question - hypothesis - variables - control group - prediction - conclusion

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)