In a class debate, a student argues that the big bang theory is "just a theory." what is most likely to be this student's understanding of scientific theories? a. theories agree with observations of nature. b. theories are just guesses. c. theories are based on large amounts of scientific evidence. d. theories can be used to make predictions.

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.