This document defines and describes various landforms and bodies of water. It explains that a bay is an area of water bordered by land on three sides, a gulf is a larger body of water partly surrounded by land, and a peninsula is a piece of land surrounded by water on three sides. It also defines deltas, isthmuses, straits, lakes, mountains, hills, plains, plateaus, rivers, waterfalls, fjords, valleys, glaciers, archipelagos, seas, and oceans.

1. Landforms

2. Bay
An area of water bordered by land on three sides

3. Gulf
A gulf is a part of the ocean (or sea) that is partly surrounded
by land (it is usually larger than a bay).

4. Peninsula
A peninsula is a piece of land that is bordered on three sides by
water.

5. Delta
Where the mouth of a river flows into an ocean, sea, lake or another river

6. Isthmus
A narrow strip of land that is bordered on two sides by water
and connects two larger land masses

7. Strait
A strait is a narrow body of water that connects two larger bodies
of water.

8. Lake
A lake is a large body of water surrounded by land
on all sides.

9. Mountain
A mountain is a landform that extends above the surrounding
terrain. A mountain is generally steeper than a hill

10. Hill
A hill is a raised area or mound of land.

11. Plain
Plains are flat lands that have only small changes in elevation.

12. Plateau
A plateau is a large, flat area of land that is higher than the
surrounding land. .

13. River
A river is a large, flowing body of water that usually empties into a
sea or ocean.

14. Waterfall
When a river falls off steeply, there is a waterfall.

15. Fjord
A fjord is a long, narrow sea inlet that is bordered by steep cliffs.

16. Valley
A valley is a low place between mountains.

17. Glacier
A glacier is a slowly moving river of ice.

18. Archipelago
group or chain of islands clustered together in a sea or ocean

19. Sea
A sea is a large body of salty water that is often connected to an
ocean. A sea may be partly or completely surrounded by land.

20. Ocean
An ocean is a large body of salt water that surrounds a continent.
Oceans cover more the two-thirds of the Earth's surface