| A | B |
|---|
| Weathering | The breakdown of rocks at or near the eart's surface into smaller and smaller pieces. |
| Chemical Weathering | When a rock's chemical makeup is altered by changing the minerals that form the rock or combining them with new chemical elements. |
| Agents of Erosion | Water, Wind, and Glaciers |
| Dust Bowl | Occuring in the Great Plains area; No life for miles and miles, just brown, cracked land and hills furrowed with eroded gulleys. |
| Moraines | The ridgelike piles of rock and debris left behind by glaciers. |
| "Ice Age" | The point of time when much of the planet's water was locked up in immense glaciers that covered up to a third of the earth's surface; A long period of time of extreme cold. |
| Mechanical Weathering | When rock is broken down or weakened physically. |
| Acid Rain | Chemicals in the polluted air that combine with water vapor and fall back to earth. |
| Sediment | Small particles of soil, sand, and gravel. |
| Loess | Windblown deposits of mineral-rich dust and silt. |
| "U" Shaped Valleys | The valleys that glaciers carve out. |
| Continental Glaciers or Ice Sheets | Broad, flat glaciers. |
| Frost Wedging | When water enters a crack on the south side of the mountainside which freezes and melts often causing rock to split and fall away. |
| Erosion | The movement of weathered materials such as gravel, soil, and sand. |
| Delta | A place where sediments build up from a river. |
| Glacier | Huge, slow-moving sheets of ice. |
| "V" Shaped Valleys | The valles that running water carve out. |
| Valley or Alpine Glaciers | Glaciers found on high mountains that are in an environment too cold for itself to melt. |
