Plunge Into The Polar

6. allows animals to maintain body temperature
7. is courser and waterproof
9. specific fat layer between the skin and muscle
11. slows metabolism to allow them to sleep until they can hunt for food again
12. plants produce long stems called
14. Grow in sheltered places on bare rock
17. animals without a backbone
19. also known as "killer whales"
20. feathers, which are thicker

1. dome-shaped hills
2. land of sedges,mosses,grasses, and lichens growing in patches
3. bacteria necessary to produce amino acids, some plants use this, plants convert it into ammonia
4. fine and traps a layer of air warmed by the body
5. plants that live for more than two years
8. specific function or position within a community of organisms
10. ears prevent heat loss
13. allows smaller animals to survive from harsh polar conditions
15. allows animals to blend with their environment
16. underground frozen layer of ice
18. small bulb that breaks off,puts down roots, and grows into a new plant