Dr. Young asks these questions of a child: "Do you ever sort of space out? Does it ever happen that time goes by and you can't remember what you were doing during that time? Do you ever do things that surprise you and you later stop and ask yourself why you did that?" What problem is Dr. Young investigating?

Which of the following statements about nicotine are true?

a) In terms of addictive power, nicotine is more powerful than heroin or alcohol. b) Nicotine can slow the heart and therefore create a sense of relaxation c) overall, the number of Americans smoking is on the increase d) overall, the number of women and teenagers smoking is on the decrease

The first step in the scientific method involves:

posing a question. running an experiment. selecting a group of participants. asking people to participate.