| A | B |
|---|
| erosion | the process by which broken-down rock material is carried from one place to another |
| weathering | the process by which rock is broken into smaller pieces |
| river system | a river and the waterways that drain into it |
| sediments | the materials that are carried by moving water |
| delta | a flat, triangler plain formed when a river empties into an ocean |
| headland | a natural piece of land that extends out into the water |
| bay | a body of water that is partly enclosed by land but has an opening called a mouth |
| sand dunes | piles of sand deposited in one place |
| glacier | a huge mass of moving ice that forms over land |
