One of many lines on the global grid running from the North Pole to the South Pole; used to measure degrees of longitude.

Broad, flat-topped landform with steep sides; smaller than a plateau

Land with steep sides that rises sharply (1,000 feet or more) from surrounding land; generally larger and more rugged than hill.

Pointed top of a mountain.

A series of connected mountains.

Place where a stream or river flows into a larger body of water.

One of the four major bodies of salt water that surround the continents.

Stream of either cold or warm water that moves in a definite direction through an ocean.

One of many lines on the global grid that circles the Earth north or south of the Equator; used to measure degrees of latitude.

Body of land jutting into a lake or ocean, surrounded on three sides by water.

Characteristic of a place occurring naturally, such as a landform, body of water, climate pattern, or resource.

Area of level land, usually at low elevation and often covered with grasses.

Area of flat or rolling land at a high elevation, about 300 to 3,000 feet (90 to 900m) high.