| A | B |
|---|
| polder | a new peice of land reclaimed from the sea; land created dikes and draining water |
| population density | The average number of people living in an area |
| peninsula | Land area nearly surrounded by water |
| plateau | a large raised area of mostly level land |
| tiibutary | A river or stream that flows inton a larger river |
| navigable | widfe enough and deep enough for ships to travel through |
| rain shadow | an area on the sheltered side of a mountain that recieves little rainfall |
| prairie | an area of grassland |
| tundra | a treeless plain in arctic areas with permantley frozen ground; during the brief season when the topsoil thaws., grassed and mosses grow |
| permafrost | soil that permanently frozen |
| taiga | an enormous Russian forest, covering more than three millin acres |
| steppe | a mostly treeless plain; in Russia the steppes are grasslands of fertile soil suitable for farming |
| loess | a type of rich, dustlike soil found on the North European Plain |
| hydro electricity | Th power generated by water driven turbines |
| fossil fuel | Fuel developed from the remains of ancient plants and animale; includes coal, oil, and natural gas |
| reserves | the availabe supplies of something, such as oil or coal |
