Physical Geography

3. A low area between hills or mountains, often with a river running through it.
5. A vast expanse of saltwater that covers most of the Earth's surface.
8. A dry, barren area of land with little or no vegetation.
10. A large, flowing body of water that usually empties into a sea or ocean.
11. A flat, elevated landform with steep cliffs on one or more sides.
12. A vast, treeless plain with permanently frozen subsoil.
13. A large natural elevation of the earth's surface with steep sides and a peak.
14. A slowly moving mass of ice formed by compacted snow.

1. A piece of land surrounded by water.
2. A large body of water surrounded by land.
4. A landform that forms at the mouth of a river where it meets a body of water.
6. A natural underground chamber or series of chambers.
7. A piece of land that is surrounded by water on three sides.
9. An opening in the Earth's crust through which molten lava, ash, and gases are ejected.
15. A deep, narrow valley with steep sides, often carved by a river.