Volcano

An opening in the earth, usually raised, through gases and lava escapes from the earth.

Mount Rainier is an example, located in Washington.

Island

a body of land surrounded by water.

Hawaii is an example of an island, located in the Central Pacific.

Strait

a narrow channel connecting two larger bodies of water.

The Strait of Hormuz

Flood Plain

Flat land near the edges of rivers formed by mud and silt deposited by floods.

California

Delta

A triangular area of land formed from deposits at the mouth of a river.

Nile river and delta.

Marsh

Soft, wet, low-lying, grassy land that serves asa transition between water and land.

Located in Louisiana

(River) Mouth

the place where a river flows into a lake or an ocean.

Located in South. America, Amazon River

Harbor

a sheltered area of water deep enough for docking ships.

Located in Hawaii, Pearl Harbor

Bay/Gulf

part of an ocean or lake partially enclosed by land.

Located south of The U.S., Gulf of Mexico

Sea level

level of the ocean's surface, used as a reference to measure the height or depth of the earth's surface.

Cape/Peninsula

a point of land extending into a ocean or lake.

Located at Florida USA

Butte

a raised, flat area of land with steep cliffs, smaller than a mesa

Monument Valley in Utah and Arizona.

Oasis

a spot of fertile land in a desert, fed by water from wells, or underground springs.

Ziz oasis, Sahara desert

Prairie

a large area, level of grassland with little or no trees.

The Great Plains