Question

scientific knowledge is based on evidence. where do scientists acquire evidence?
a. from observations or experiments
b. from scientific theories
c. from scientific hypotheses
d. from reading popular magazines

Explanation:

Scientists gather evidence through observations of natural phenomena and controlled experiments. Scientific theories are explanations based on evidence, hypotheses are proposed explanations before evidence - gathering, and popular magazines are not a reliable source for scientific evidence.

Answer:

A. from observations or experiments