Opening in the earth, usually raised, where gases and lava come out of -Alaska

A narrow, deep valley with steep sides -Grand Canyon

The steep, almost fertile edge of a hill, mountain, or plain -Nevada

Broad, flat area of land higher than the surrounding land -South Dakota

A lowland region that is saturated by water -Florida

A body of land surrounded by water -Hawaii

Lowland between hills or mountains -Montana

Large ice mass that moves slowly down a mountain or overland -Alaska

A large, level area of grassland with few or no trees -Oklahoma

Elevation of the earths surface with steep sides and greater height than a hill -Idaho