One of the most important indicators of our warming climate is the extent and thickness of polar sea ice. Currently satellites measure the extent of polar sea ice but it takes more sophisticated equipment aboard a low-flying plane to actually measure the thickness of sea ice. This lesson will show students how this is done.
This short article is an U.S. Fish and Wildlife Service fact sheet about Ursus maritimus, the Polar Bear. It covers basic information, including: appearance, feeding habits, reproduction, adaptations, and protection.