The Polar Bear is the only bear classified as a marine mammal due to it's reliance on sea ice habitat. It's a common misconception that polar bears can move onto land and live like other bears once sea ice disappears. Here is a great source of more interesting facts on Polar Bears.
Polar Bears - Fun Facts About Polar Bears PowerPoint. Polar bear facts including information on polar bear size, adaptations, what polar bears eat, cubs, how global warming affects polar bears, the polar bear environment, etc. Informational text for reading practice.