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22 Cards in this Set
- Front
- Back
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Weathering definition and categories |
Breakdown of rock by rainwater, temperature, and biological activity. Physical and chemical |
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List and describe four types of mechanical weathering |
1. Water carving rock 2. Heating and cooling cycle 3. Forest fires can weather ground rocks 4. Tree roots growing through a sidewalk |
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Discuss the role of water in chemical weathering |
Water acts as a solvent to dissolve, transport, and deposit minerals from one location to another |
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Weathering definition |
The breakdown of rocks by action of rainwater, extreme temps, and biological activity |
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Mass wasting definition |
Slope movement. Landslides or mudflows |
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Erosion |
A process that removes rock from one location and moves it to another |
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Mechanical weathering |
The process of degradation due to temperature. Sometimes assisted by water |
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Chemical weathering |
Degradation caused by water reacting with stone to form clay |
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Frost wedging definition |
Degradation causes by repeated freezing and thawing of water in a rocks cracks |
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Sheeting definition |
Exfoliation. The process of degradation caused by stripping layers of rocks from a large rock mass |
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Exfoliation dome |
Large, round, smooth dome caused by the unloading and expansion of rock. |
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Joint |
Two sections of rock that moved away from each other |
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Salt Crystal growth |
Weathering caused by the evaporation of water in rock cracks that leaves behind salt crystals |
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Biological activity |
Change caused by living things like tree roots and bacteria |
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Dissolution |
Minerals being dissolved in water |
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Oxidation |
The exposure of a material to oxygen that causes chemical reactions in the material |
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Hydrolysis |
The breakdown of materials when combined with water |
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Spherical weathering |
Weathering that occurs to joined bedrock resulting in spherical weathered bedrock |
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Difference between mechanical and chemical weathering |
Mechanical weathering doesn't involve the breakdown of rock on a molecular level |
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Types of mechanical weathering |
Fracturing and abrasion |
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Types of chemical weathering |
Oxidation, carbonation, hydrolysis, and dehydration |
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How does climate affect weathering |
Extreme climates will weather rocks faster than milder climates |
