1. How did the volcano explosion in Sumatra affect life on Earth?
(a) It caused an incredible explosion of genetic diversity, producing many new species.
(b) It caused the extinction of the dinosaurs.
(c) It caused an evolutionary bottleneck in which much genetic diversity was lost.
(d) It was connected with the beginning of the evolution of modern humans.

2. Why has the United States been so slow to convert maps to the metric system?
(a) The metric system is not as efficient for mapmaking as the English system of measurement.
(b) The Ordinance of 1785 required land to be laid out in township squares measured in feet.
(c) U.S. geographers are not accustomed to the metric system and prefer not to use it.
(d) Geographers prefer not to use the metric system in maps until it is used for other things too.

3. Which of the following activities requires the skills of a geographer?
(a) Studying the history and current events of a particular country.
(b) Traveling to a distant place and blogging about the trip in an online journal.
(c) Tracking outbreaks of disease and predicting where diseases will spread in the future.
(d) Comparing the structures of government in two different cultures.

4. What life forms are threatened during Earth's Ice Ages?
(a) All life forms.
(b) Only land animals.
(c) Only marine life.
(d) Only plant life.

5. Why does de Blij feel that Americans are unprepared to evaluate global warming?
(a) Because they do not take classes in geography.
(b) Because they do not understand geologic history.
(c) Because they do not know enough about science.
(d) Because they do not pay attention to current events.