7. In scientific method, a predictive statement about observation that can be tested scientifically is called;

A. Truth

B. Evidence

C. Proof

D. Hypothesis

8. Anything that can change in an experiment is called a

A. Measurement

B. Variable

C. Observation

D. Qualitative

9. The scientific method is

A. ways scientist make problems and ask questions

B. ways scientists never solve problem

C. ways scientists answer questions and solve problems

D. All of the above​