| A | B |
|---|
| erosion | the process by which broken-down rock material is carried from one place to another by moving water, wind, or moving ice |
| weathering | is the process by which rock is broken into smaller pieces |
| river system | a river and the waterways that drain into it |
| sediments | materials that are carried by moving water |
| delta | a flat, usually triangular plain formed by deposits of sediment where a river empties into the ocean |
| headland | is 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, connecting the water to the ocean |
| jetty and seawall | a structure built by man to stop the erosion of sand |
| sand dunes | a mound , hill, or ridge of sand formed by the wind |
| windbreaks | fences, shrubs, grass, or trees---anything that can slow down the wind |
| butte | a narrow-topped hill with very steep clifflike sides |
| glacier | a huge mass of slow-moving ice that forms over land |
| erratics | large boulders dropped by a glacier as it melts |
