| A | B |
|---|
| weathering | when rock is broken or weakened down into smaller and smaller peices |
| mechanical weathering | when rock is broken down physically |
| chemical weathering | when a rocks minerals are changed or mixed with new minerals |
| acid rain | when water vapor and polluted air is mixed then falls as percipitation |
| erosion | the movement of weathered materials |
| sediment | small particles of soil, sand and gravel |
| loess | windblown deposits of mineral-rich dust |
| glaciers | huge slow-moving sheets of ice |
| moraines | piles of rock and debris lef behind by glaciers |
| "Dust Bowl" | a period of time where a certain group of states had a drought caused by wind in the 1930's |
| "Ice Age" | periods of cold temperatures |
| frost wedging | a process wen water is frozen in the crack of a rock and splits it |
| continental glaciers/ice sheets | glaciers that existed during the ice age and some are still around today |
| delta | the end of a river where sidiment is build-up |
| valley/alpine glaciers | glaciers snaked through big mountain ranges |
| "U" shaped valleys | a valley formed by a glacier that once drove through it |
| agents of erosion | water, wind and glaciers |
| "V" shaped valleys | valleys that aren't shaped in a curve |
