Regions of North America

A large area of a sea or ocean partially enclosed by land.

• continent

• gulf

• tributary

The height of something above a point of reference, usually sea level.

• climate

• environment

• elevation

A material source of wealth that occurs in a natural state and has economic value.

• natural resource

• renewable resource

• nonrenewable resource

One of the principal landmasses of the earth, usually regarded as including Africa, Antarctica, Asia, Australia, Europe, North America, and South America.

• continental shelf

• continent

• glacier

A large river and its tributaries.

• sea

• gulf

• river system

The totality of the natural world, often excluding humans.

• world

• environment

• globe

Lacking moisture, especially having insufficient rainfall to support trees or woody plants.

• wet

• arid

• dry

A natural resource that can be replenished.

• nonrenewable resource

• natural resource

• renewable resource

Sharing an edge or boundary; touching.

• contiguous

• land use

• landlocked

The location of a place in relation to someplace else.

• absolute location

• relative location

• elevation