Ocean
Land
Where land and ocean meet
Rivers
Water and land
100

A body of water forming an indentation of the shoreline

What is a bay?

100

The high steep face of a rock

What is a cliff?

100

The land next to the sea

What is the coast?

100

A part of a river where the current is very fast

What are rapids?

100

A small fertile area in a sand desert, usually having a spring or well.

What is an oasis?

200

A large portion of an ocean or sea, partly enclosed by land

What is a gulf?

200

A series of mountains in all in a line

What is a mountain range?

200

A tract of land completely surrounded by water, not large enough to be a continent 

What is an island?

200

The end of a river, where it goes into a lake, sea, or ocean.

What is the mouth of a river?

200

A narrow passage of water connecting two larger bodies of water

What is a strait?

300

A small indentation of a shoreline, usually long and narrow

What is an inlet?

300

An area of land that is flat, and raised above the surrounding land on at least one side

What is a plateau?

300

A part of a body of water along a shore deep enough for anchoring a ship

What is a harbour?

300

An area of higher ground between two adjacent streams 

What is a divide?

300

A ridge of rocks, sand, or coral at or near the surface of water

What is a reef?

400

A long, narrow arm of sea bordered by steep cliffs

What is a fjord?

400

Low hills at the base of a mountain or mountain range

What are foothills?

400

A narrow strip of land, bordered on both sides by water, connecting two larger bodies of land

What is an isthmus?

400

A stream that flows to a larger stream or another body of water

What is a tributary?

400

A nearly flat plain of alluvial deposit between diverging branches of the mouth of a river

What is a delta?

500

An embankment for controlling or holding back water from a sea or river

What is a dike?

500

An elongated depression between uplands, hills, or mountains

What is a valley?

500

A large group of islands

What is an archipelago?

500

An almost flat plain along the course of a river or stream, that is naturally subjected to flooding

What are flood plains?

500

A ring-shaped coral reef, or a string of closely spaced small coral islands, enclosing a shallow lagoon

What is an atoll?