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geo
| Term | Definition |
|---|---|
| bay | A bay is a body of water that is partly enclosed by land (and is usually smaller than a gulf). |
| cape | A cape is a pointed piece of land that sticks out into a sea, ocean, lake, or river. |
| canyon | A canyon is a deep valley with very steep sides - often carved from the Earth by a river. |
| cave | A cave is a large hole in the ground or in the side of a hill or mountain. |
| dune | A dune is a hill or a ridge made of sand. Dunes are shaped by the wind, and change all the time. |
| estuary | An estuary is where a river meets the sea or ocean. |
| GPS | GPS is short for global positioning system. GPS devices tell you your exact longitude and latitude (it gets the information from orbiting satellites). |
| key | The key of a map (also called the legend) is a small table accompanying the map that explains the symbols that are used on the map. |
| lake | A lake is a large body of water surrounded by land on all sides. Really huge lakes are often called seas. |
| mountain | A mountain is a very tall high, natural place on Earth - higher than a hill. The tallest mountain on Earth is Mt. Everest. |