| A | B |
|---|
| acceleration | the rate at which velocity changes |
| balanced forces | equal forces acting on an object in opposite directions |
| delta | a landform made of sediment that is deposited where a river flows into an ocean or lake |
| deposition | the process by which sediment settles out of the water or wind that is carrying it and is deposited in a new location |
| erosion | the process by which water, ice, wind or gravity moves fragments of rock or soil |
| flood plain | a broad, flat valley through which a river flows |
| friction | the force that oppposes the motion of one surface as is moves across another surface |
| force | a push or pull exerted on an object |
| headwaters | the many small streams that come together as the source of the river |
| levee | a long ridge formed by deposits of sediment alongside a river channel |
| linear | term used to desrcibe a relationship between variables whose graph is a straight line |
| meander | a looping curve formed in a river as it winds through its flood plain |
| meter | the basic SI unit of length |
| motion | the state in which one object's distance from another is changing |
| mouth | the point where a river flows into another body of water |
| net force | the overall force of an object when all the individual forces acting on an object are added together |
| nonlinear | term used to describe a relationship between variables whose graph is not a straight line |
| oxbow lake | the crescent-shaped, cutoff body of water that remains after a river carves a new channel |
| reference point | a place or object used for comparison to determine if an object is in motion |
| sediment | small, solid peices of material from rock or organisms which are moved by water or wind, resulting in erosion and deposition |
| speed | the distance an object travels in one unit of time |
| unbalanced force | a nonzero net force that changes an object's motion |
| velocity | speed in a given direction |
