| A | B |
|---|
| fast | to abstain from or eat very little food |
| global warming | the increase in the average temperature of Earth's atmosphere and oceans |
| ingest | to consume or eat |
| inhabitant | an animal that lives in a certain location |
| inhospitable | an unfriendly place to live |
| insulate | to retain (or keep in) heat |
lichens,  | crusty fungi that grow on rocks and trees |
| migrate | to move from one region to another |
| plight | unfortunate or terrible situation |
| pollutants | dirt or debris in the air or on the ground |
| poses | causes |
| prey | an animal that is hunted for food |
| thrive | to grow and be healthy |
| toxic | something poisonous that can cause death |
| tundra | frozen, treeless plain; frozen land |
| venturing | exploring or moving around - often at great risk |
| vast | great in size or degree; a large amount |
| region | an area of the world distinguished by specific geographic features |
| transparent | clear; see through |
Arctic,  | relating to the North Pole or the surrounding area such as the Arctic Circle |
