| A | B |
|---|
| energy | the ability to do work or cause change |
| potential energy | energy that is stored and waiting to be used later |
| kinetic energy | energy that an object has due to motion |
| abrasion | the wearing away of rock by a grinding action |
| load | the amount of sediment a river carries |
| friction | the force that opposes the motion of one surface as it moves across another surface |
| turbulence | a type of movement when water moves every which way |
| glacier | any large mass of ice that moves slowly over land |
| valley glacier | a long, narrow glacier that forms high in a mountain valley |
| continental glacier | a glacier that covers much of a continent or large island |
| ice age | times when continental glaciers have covered much of Earth's surface |
| plucking | a process that allows moving glaciers to pick up rocks |
| till | the mixture of sediments that a glacier deposits directly on the surface |
| moraine | the ridged-figure formed when till is deposited at the edges of a glacier |
| kettle | a small depression that forms when a chunk of ice is left in glacial till |
| beach | an area of wave-washed sediment along a coast |
| longshore drift | a process that causes the current to move some of the sediment down the beach |
| spit | a beach that projects like a finger into the water |
