| A | B |
|---|
| Weathering | is the breakedown of rocks into smaller and smaller pieces |
| Mechanical Weathering | occurs when rock is actually broken or weakend phisically |
| Frost wedging | when ice builds up on mountians and cracks the mountian |
| Chemical weathering | alters rocks matierials and changes the minerals |
| Acid rain | chemicals in the polutted air combines w/ water vapor and fall back to the earths surface |
| Erosion | is movement of weatherd matierals such as gravle sand and silt |
| Agents of erosion | Mechanical weathering and chemical weathering |
| Sediment | small particals of soil sand and gravle |
| Delta | sediment build up at the end of a river that runs off into the ocean |
| Dustbowl | fertile soil blew away several states became part of what is called a dust bowl |
| Loess | deposits of mineral rich dust and silt |
| Glaciers | huge, slow moving shetts of ice |
| Mourines | ridgelike pile of rocks and derbis |
| "U" shaped valleys | canyons |
| "V" shaped valleys | valley |
| Ice age | a time when 3/4 of the earth was covered in ice |
| Continental glacies | ice sheets |
| Valley | alpine glaciers |
