The pattern of weather over time in a particular place.

The area of low land along the Atlantic Ocean and Gulf of Mexico.

The level or height of the ocean's surface.

A large inlet of the sea nearly surrounded by land.

An area of land that has water on three sides.

The place a river or stream begins.

A stream or river that empties into another river.

A high, flat area of land.

The height of land in relation to sea level.

A narrow gap or route through a mountain range.

A system of waterways that all drain into the same body of water.

A low, shallow area on Earth's surface.

A narrow valley with steep walls.

An opening in the earth's crust through which hot lava, rock, ash, and gases are released.