The Force of Moving Water Chapter 3 Section 3 Pages 86 - 90

Objective: Compare and contrast constructive and destructive forces. Energy: Ability to do work or cause change. *Potential Energy: Energy that is stored. *Kinetic Energy: Energy from Motion. As gravity pulls water down a slope, the water’s potential energy changes to kinetic energy that can do work. Most sediment washes or falls into the river as a result of mass movement and run-off. Other sediment erodes from the bottom or sides of the river.

Abrasion: The wearing away of rock by a grinding action. Load: Amount of sediment that a river can carry. A river’s slope, volume of flow, and the shape of its streambed all affect how fast the river flows and how much sediment it can erode. Water moves fastest along the outside of the curve. sediment is deposited on the inside curve, where the water is the slowest. Friction: The force that opposes the motion of one surface as it moves across another surface. Turbulence: When water moves every which way Because of the roughness of the streambed.