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21 Cards in this Set
- Front
- Back
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Weathering
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The process that breaks down rock and other substances at earth's surface.
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Mechanical/Phsical weathering
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is a type of weathering in weathering in which rock is physically brken into smaller pieces.
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Chemcial (Decomposition)
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is the process that breaks down rock throungh chemical changes.
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Mechanical weathering
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breaks rock into pieces by freezing and thawing, release of pressure, growth of plants, actions of animals, and abrasion.
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Abration
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is the grinding away of rock by rock particles carried by water,ice,wind,or gravity.
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Ice wedging
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A common kind of mechanical weathering.
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Chemical Weathering
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is the process that breaks down rock through chemical changes.
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Water
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is the most important agent of chemical weathering.
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Gases
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can cause chemical weathering,too!
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Oxygen
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gas in the air can combine with metal to form rust in a process called Oxidation.
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Carbon dioxide
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can combine with water to form an acid that weathers.
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Living organisms
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can cause chemical weathering.
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Rate of Weathering
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The most important factors that determine that rate at which weathering occurs are type of rock and climate.
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Soil Formation
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As rock is broken down by weathering and mixes with other materials, it forms soil.
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Soil
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is the loose, weathered material on earth's surface in which plants can grow.
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Bed rock
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is the solid layer of rock underneath the soil. when exposed at the surface, bedrock weathers into particles that form that basic material for soil.
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Erosion
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is the process in which natural forces move weathered rock and soil from on place to another.
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Sediment
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the material moved by erosion .
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Depasition
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occurs when the forces of erosion lay down sediment.
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Erosion occurs by
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gravity,ranning, water, waves, and wind.
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Gravity
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is the force that moves rock and other materials downhill.
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