Try working through the seven steps for problem solving on each of these sample problems.

• The Forest in the Trees: How much shorter than you is the next shortest person in the world?

• You are What You Eat: What is the probability that part of you was once part of a tyrannosaurus rex?

• The Big Blue Marble: An astronomer decides to measure the radius of the Earth over dinner, which she spends watching the sun set over the Pacific Ocean, using nothing but a watch. Write up a brief, simple explanation of how her experiment will work, and estimate the value of all relevant parameters. What is the minimum resolution necessary on the watch-face for success?

• The Gates of Heaven: The Golden Gate Bridge maintains a full time painting crew. By the time the crew reaches one end of the bridge, it is time to start again on the other end. How many people are on the team? (For no extra credit: Where do they park?)