| A | B |
|---|
| erosion | Gradual wearing away and removing of rock material by forces such as moving water, wind, and moving ice |
| Weathering | The physical and Chemical processes by which rock is broken down into smaller pieces |
| River system | a river and all the waterways, such as brooks, streams, and rivers, that drain into it |
| Sediments | Sand, soil, and rock carried by water, wind, or ice. |
| Delta | A flat, usually triangular plain formed by deposits of sediment where a river empties into the ocean. |
| Headland | A piece of land that extends out into the water and usually slows down the flow of water that passes it. |
| Bay | Part of a sea or lake extending into the land. |
| Sand Dunes | A mound, hill, or ridge of sand formed by the wind. |
| Butte | Narrow topped hill with very steep clifflike sides. |
| Glacier | A huge mass of slow-moving ice that forms over land |
