1. Gold, natural gas, and copper are all examples of resources Land Labor Capital Entrepreneurship 2. Kevin received an income tax refund of $750 and is trying to decide between three possible purchases: (a) A new bicycle, (b) A laptop computer, and (c) A new high definition T.V. If he purchases the T.V., his opportunity cost is... A) the bicycle and the laptop computer since both are given up B) $750, the amount of money spent on the purchase the laptop computer D) the bicycle E) either the bicycle or the laptop computer, depending on his preferences. 3. Thinking about the difference between scientific experiments and economic experiments, which of the following describes the key difference? A) Economic experiments are conducted in laboratories, while scientific experiments are conducted in markets B) Theories can be developed in scientific experiments but not in economic experiments C) The Ceteris Paribus Assumption is used in economic experiments but not in scientific experiments D)- Variables are easily controlled in scientific experiments but not in economic experiments E) None of the above