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36 Cards in this Set
- Front
- Back
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What is unweathered rock?
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Bedrock
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What is topsoil?
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The smallest particles, organic
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What are pressure changes?
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Occur under the earth with a large amount of pressure.
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How do animals cause physical weathering?
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They dig in the soil.
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What are the layers of soil formation?
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topsoil, subsoil, partly weathered rock, unweathered rock
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What forces break rocks?
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physical and chemical changes and weathering
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What are physical changes?
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Changes when there is a new chemical makeup.
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What are the agents for chemical weathering?
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Acids, oxygen, plants
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What is earth's surface made of?
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igneous, sedimentary, metamorphic rocks
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When does ice change the shape of the land?
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When it melts.
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What is frost action?
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Rain seeping into cracks of rock that freezes and breaks up the rock.
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What forces build up the earth's surface?
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Plates that move slowly past or away from each other.
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How does wind cause physical weathering?
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Has dust and sand that act like sandpaper.
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How do plants cause physical weathering?
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Their roots break up rocks.
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What does ice contain to be an agent of erosion?
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soil, rocks, boulders that act like scraping tools
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How does soil form?
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By the weathering of rocks, physical and chemical.
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What can a stream do to cause erosion?
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It can change the shape of the land.
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What is erosion?
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Agents are water, wind, and ice.
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What are the differents types of acids?
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plants, mosses, lichens, fossil fuels, carbonic, and sulfuric
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What is metamorphic rock?
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Rock that is changed by heat or pressure.
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What is subsoil?
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Larger particles, clay and minerals
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How does air cause chemical weathering?
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By oxidation.
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What type of process is weathering?
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A slow process
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What causes physical weathering?
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frost action,pressure changes, moving water, wind, plants, animals
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What is acid rain?
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a mixture of acid and rainwater
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Partly weathered rock cannot support what?
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Plant life
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How is water an agent of erosion?
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Water has energy.
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What is chemical weathering?
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Breaking of rocks by changing its chemical makeup.
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How does moving water cause weathering?
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Waves pound rocks and they crack.
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What are plates responsible for?
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formation of mountains, volcanoes and earthquakes.
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What is sedimentary rock?
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Small pieces of rock called sediment.
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What is a chemical change?
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A new substance is formed
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How do soils differ?
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From amounts and kinds of materials they contain and the climate.
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How does wind cause erosion?
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Has energy that leaves sediments that can form sand dunes.
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How is ice an agent of erosion?
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The gravity and energy it contains.
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What is igneous rock?
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Rock that is melted material that cools and hardens.
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