| A | B |
|---|
| sediment | solid fragments or particles that are transported and deposited by wind, water or ice |
| gradient | the slope of a stream or river expressed as a loss in elevation of the stream or river with distance downstream |
| accumulate | to pile up little by little |
| slope | ground that is not flat, forms an incline |
| slope | ground that is not flat, forms an incline |
| erosion | the wearing away of rock or soil by the action of a stream or river |
| downstream | toward the mouth of the river or in the direction the river flows |
| upstream | in the direction opposite the flow of a river |
| vertical | an up and down direction |
| horizontal | parallel to the horizon |
| discharge | the volume of water that flows past a point on a river per unit of time |
| downcutting | erosion of a valley by a stream or river |
| headwaters | area of the river farthest away from the mouth, where the river starts |
| floodplain | the area where water spreads when a river or stream overflows its banks |
| meander | a winding path |
