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12 Cards in this Set
- Front
- Back
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How do weathering and erosion affect Earth's surface ?
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Topography is reshaped by weathering and erosion. These processes work together continuously to wear down and carry away rocks at Earth's surface.
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What are the causes of mechanical weathering and chemical weathering ?
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The causes of mechanical weathering include freezing and thawing, release of pressure, plant growth, actions of animals, and abrasion. The causes of chemical weathering include the action of water, oxygen, carbon dioxide, living organisms, and acid rain.
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What determines how fast weathering occurs ?
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The most important factors that determine the rate at which weathering occurs are the type of rock and climate.
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What is weathering ?
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Weathering is the process that breaks doown rock and other substances at Earth's surface.
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What is erosion ?
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Erosion is the transportation of sediment by wind, water, ice, or gravity.
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What is uniformitarianism ?
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Geologists make inferences based on the principle of uniformitarianism. It states that the same processes that operate today, operated in the past.
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What is mechanical weathering ?
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Mechanical weathering is the type of weathering in which rock is physically broken into smaller pieces.
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What is abrasion ?
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Abrasion refers to the grinding away of rock by rock particles carried by water, ice, wind, or gravity.
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What is ice wedging ?
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Ice wedging is when the ice melts, the water seeps deeper into the cracks. With repeated freezing and thawing, the cracks slowly expand until pieces or the rock break off.
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What is chemical weathering ?
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Chemical weathering is the process that breaks down rock through chemical changes.
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What is oxidation ?
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Oxidation is when iron combines with oxygen in the presence of water in a process.
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What is permeable ?
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Permeable is when a material is full of tiny, connected air spaces that allow water to seep through it.
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