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chap 12 less 1 vocab

Uniformitarianism A principal that states that geologic processes that operate today also operated in the past
Erosion The process of wearing down and carrying away rocks
Weathering The process that breaks down rock and other substances
Mechanical weathering The type of weathering in which rock is physically broken into smaller pieces
Chemical weathering The process that breaks down rock through chemical changes
Abrasion refers to wearing away of rock by rock particles carried by water, ice, wind, or gravity
Frost wedging wedges of ice and rocks widen and deepen cracks
Oxidation Iron combines with oxygen in the presence of water
Permeable a material is full of tiny, connected air spaces that allow water to seep through it
What breaks down rocks? Erosion works continuously to weather and carry away rocks at Earth's surface.
What causes mechanical weathering? The natural agents of weathering include freezing and thawing, release of pressure, plant growth, actions of animals, and abrasion.
What causes chemical weathering? The agents of chemical weathering include water, oxygen, carbon dioxide, living organisms, and acid rain.
How fast does weathering occur? The most important factors that determine the rate at which weathering occurs are the type of rock and the climate.
Created by: kwinkler