1. Polar Bears Past Bedtime AdaptationsHibernationTundraGlobal Warming Artic CirclePermafrostAurora Borealis Frigid KayakIgloosPredatorsMushers CarnivorousEndangeredShamansParka Magic Tree House Vocabulary

2. Adaptations The process or state of changing to fit a new environment or different conditions, or the resulting change. home

3. Hibernation To be in a dormant state resembling sleep over the winter while living off reserves of body fat, with a decrease in body temperature and pulse rate and slower metabolism. Animals that hibernate include bears, bats, and many amphibians. home

4. Tundra The level or nearly level treeless plain between the ice cap and the timber line of North America, Europe, and Asia that has permanently frozen subsoil. home

5. Global Warming An increase in the world's temperatures, believed to be caused in part by the greenhouse effect. home

6. Artic Circle Parallel of latitude on the surface of the Earth at 66°30’ N. It marks the southern limit of the area in which the Sun does not rise on the winter solstice (usually December 21 or 22) or set on the summer solstice (usually June 21 or 22). home

7. Permafrost Underlying soil or rock that remains permanently frozen, found mainly in the polar regions. home

8. Aurora Borealis The colored lights seen in the skies around the North Pole. home

9. Frigid Having a very cold temperature. home

10. Kayak A lightweight plastic or fiberglass covered canoe propelled by a double-bladed paddle, used for leisure and in competitive sport. home

11. Igloos An Inuit dwelling, usually dome-shaped and built from blocks of packed snow. home

12. Predators A carnivorous animal that hunts, kills, and eats other animals in order to survive, or any other organism that behaves in a similar manner. home

13. Mushers To travel on a dogsled, or drive a dogsled or team of dogs. home

14. Carnivorous Feeding mainly on the flesh of other animals. home

15. Endangered To expose somebody or something to danger. home

16. Shamans A spiritual leader who is believed to have special powers such as prophecy and the ability to heal. home

17. Parka A thick, fur-lined, hooded outer garment for arctic conditions, pulled on over the head. Traditionally, parkas are made of animal hide and worn by the Inuit and Aleut people. home