This week’s quiz tests your knowledge of geologic features and processes in the national parks that lie within the Pacific Ring of Fire, an area of frequent earthquakes and volcanic eruptions that rings the Pacific Basin. Answers are at the end. If we catch you peeking, we'll make you write "convergent boundary" 100 times on the whiteboard.

Talk volcanoes and national parks and folks usually think of Hawaii Volcanoes National Park, and perhaps Lassen Volcanic National Park. In truth, though, there are at least 13 units of the national park system that have a volcanic past in some form or fashion.