click below
click below
Normal Size Small Size show me how
Physica Geography
Weathering and Erosion
Question | Answer |
---|---|
The breakdown of rock at or near the earth's surface | Weathering |
When rock is actually broken or weakened physically | Mechanical Weathering |
Alters a rock's chemical makeup by changing the minerals that form the rock, or combining them with new elements. | Chemical Weathering |
Chemicals in the polluted air combine with water vapor and fall back to earth | Acid Rain |
Is the movement of weathered materials such as gravel, soil, and sand. | Erosion |
Water expands when it freezes, the ice widens the crack and eventually splits the rock | Frost Wedging |
One of the major causes of erosion, expecially in areas with little water and few plants to hold soil in place. The Dust Bowl was an example. | Wind Erosion |
The greatest cause of erosion. Moving water--rain, rivers, streams and oceans. | Water Erosion |
Huge slow moving sheets of ice. Move over many years as layers of unmelted snow are pressed together | Glaciers |
The reaction of Iron and Oxygen. | Rust |