2. An area formed by soil and rocks washed downstream by a river.

(a)  

3. A mountain that builds up around an opening in the Earth's surface.

(a)  

4. A narrow waterway that connects two larger bodies of water.

(a)  

5. The entire body of salt water that cover 75% over the Earth's surface.

(a)  

6. A small stream or river that flows into a large river.

(a)  

7. Part of an ocean lake that is partly enclosed by land

(a)  

8. Huge body of ice

(a)  

9. A broad stretch of level or nearly level land.

(a)  

10. A group of mountains connected together.

(a)  

11. The place where a river flows or opens into a larger body of water.

(a)  

12. A large level of high land.

(a)  

13. The place where a river begins.

(a)  

14. Land that borders on the sea or ocean

(a)  

15. A piece of land that is surrounded by water on three sides.

(a)