Crossword

3. Narrow body of water that connects two large bodies of water
5. Ecosystem that receives fewer than 25 centimeters of precipitation a year
7. Piece of land high above sea level with a steep side
10. Areas where the subsoil is permafrost
11. Body of land that is surrounded by water on three sides
13. Lines that run vertically from pole to pole
14. Deep valley with steep rock sides
15. Piece of land smaller than a continent and completely surrounded by water
16. Group of islands that are close to each other

1. The position north or south of the equator measured from 0° to 90°
2. Raised land that is smaller than a mountain
4. A large body of salt water
6. Imaginary line that splits the world into the Northern Hemisphere and the Southern Hemisphere
8. Home of the historic Prime Meridian. Also an area in SE London
9. Low land that lies between mountains or hills
12. Narrow strip of land connecting two larger land masses