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28 Cards in this Set
- Front
- Back
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What is the process by which rocks are broken down physically or chemically called?
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Weathering
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What is it called when rocks are broken down into smaller pieces by physical means?
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Mechanical Weathering
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Which of the following is an agent of mechanical weathering?
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Gravity
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What is the alternate freezing and thawing of soil and rock called?
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Frost Action
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What type of frost action occurs when a crack in a rock widens from the freezing and thawing of water?
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Ice Wedging
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What is the grinding and wearing away of rock by other rocks or sand called?
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Abrasion
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What causes abrasions of rocks and pebbles in fast-flowing streams?
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Water
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What causes abrasions when one rock falls off a mountainside onto another rock?
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Gravity
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Which is an example of a plant causing mechanical weathering?
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A Tree Root Causing A Root To Crack
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How can animals that live in soil cause mechanical weathering?
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By Burrowing
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What is it called when rocks break down due to chemical reactions?
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Chemical Weathering
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Which of the following is a common agent of chemical weathering?
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Weak Acids
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What kind of weathering rakes place when a sugar cube dissolves in water?
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Chemical Weathering
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What is rain, sleet, or snow that contains a lot of acid called?
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Acid Precipitation
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Which of the following can cause acid precipitation?
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Burning Fossil Fuels
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What can result from acids in groundwater coming into contact with limestone?
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Karst Features
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What kind of organisms produce acids that slowly break down when the rocks live on?
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Lichens
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When oxygen in the air rects with iron, what substance is formed?
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Rust
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What is it called when an element combines with oxygen to form an oxide?
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Oxidation
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Which sentence best describes weathering?
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Weathering is a process that takes a long time
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What is it called when softer rocks wear away and leave harder rocks behind?
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Differential Weathering
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On what part of a rock does weathering take place?
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Outer Surface
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What happens to the rate of weathering of a big rock is broken into smaller pieces?
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The rate of weathering increases
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What do we call the average weather condition in an area over a long period of time?
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Climate
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In what type of climate does chemical weathering happen most quickly?
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Warm and Humid
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What kind of weathering causes a mailbox to rust?
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Oxidation
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Which part of a mountain weathers most quickly?
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Peak
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How does the steepness of a mountain affect the rate of weathering?
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Steeper mountains weather more quickly
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