| A | B |
|---|
| polder | patches of new land |
| population density | the average number of people living in a given area |
| peninsula | a land area surrounded by water on three sides |
| plateau | a large, mostly flat area that rises above land and one side has a steep slope |
| tributary | a river/stream that flows into a larger river |
| navigable | a body of water wide enough for ships to manuever |
| rain shadow | an area on the sheltered side of a mountain that receives little rainfall |
| prarie | a large, grassy area |
| tundra | a region where temperatures are always cold and low growing plants can grow |
| permafrost | soil that is permanently frozen |
| taiga | an enormous Russian forest |
| steppe | mostly treeless plain |
