The Cheyenne River is a ______ of the Missouri River.

A famous ______ is at the mouth of the Mississippi River.

A ______ near the tip of South America is named for Ferdinand Magellan.

The Galapagos Islands off South America form an ______.

Spain and Portugal are on a large body of land called a ______.

Napa is a ______ in California that is famous for its grapes.

You might see camels at an ______ in the Sahara Desert.

The country of Panama forms an ______ between North and South America.

The high, flat land of Central Mexico is a ______.

A waterfall sometimes descends into a deep ______.