This week’s quiz will find out if you are a winterwise park visitor. Answers are at the end. If we catch you peeking, we’ll make you explain why the Bergeron-Findeisen process grows snowflakes only because the equilibrium vapor pressure of water vapor with respect to ice is less than that with respect to liquid water at the same subfreezing temperature.

Wildlife viewing is a prime attraction of our national parks. Not every wildlife species we might encounter in the parks is as charismatic as a bison, a bald eagle, or a sea otter, but every species is interesting in its own way. Take this week's quiz and see whether your knowledge of watchable wildlife is as keen as you think. Answers are at the end. No peeking.