Earth Science Unit 3: Weathering Introduction Quiz
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Questions and Answers

What are the two main types of weathering?

  • Exfoliation and Erosion
  • Mechanical and Chemical (correct)
  • Igneous and Sedimentary
  • Volcanic and Metamorphic
  • What is weathering?

  • The formation of new rocks from existing rocks
  • The movement of rock from one place to another
  • The process of rock formation
  • The physical and chemical breakdown of rock at or near the Earth's surface (correct)
  • How does weathering affect rock strength and permeability?

  • It increases rock strength and reduces permeability
  • It decreases rock strength and has no effect on permeability
  • It reduces rock strength and increases permeability (correct)
  • It has no effect on rock strength or permeability
  • What contributes to the physical and chemical breakdown of exposed rock?

    <p>High temperatures, pressures, and substances, especially water</p> Signup and view all the answers

    What does weathering make rock more susceptible to?

    <p>Mass wasting and erosion</p> Signup and view all the answers

    What is the primary function of weathering?

    <p>To decrease the strength and permeability of rocks</p> Signup and view all the answers

    After studying the module, what should students be able to do?

    <p>Define weathering and distinguish between the two main types of weathering</p> Signup and view all the answers

    Which type of weathering involves physical forces that break rock into smaller pieces without changing the mineral composition?

    <p>Mechanical weathering</p> Signup and view all the answers

    What is the main source of power for mechanical weathering?

    <p>Gravity</p> Signup and view all the answers

    What is the process that occurs when moist soils freeze and expand, leading to the growth of ice lenses?

    <p>Frost heave</p> Signup and view all the answers

    What is the unique property of liquid water that contributes to frost wedging?

    <p>Expanding about 9 percent upon freezing</p> Signup and view all the answers

    Which process leads to the fragmentation of rock through the movement of mobile agents such as gravity, wind, and water?

    <p>Erosional agents</p> Signup and view all the answers

    What is the result of mechanical weathering?

    <p>Breaking rocks into smaller pieces without changing mineral composition</p> Signup and view all the answers

    Which type of weathering involves chemical change that alters the chemical composition of rocks?

    <p>Chemical weathering</p> Signup and view all the answers

    What are the two main types of weathering?

    <p>Physical and chemical</p> Signup and view all the answers

    Which process occurs when moist soils freeze and expand, leading to the growth of ice lenses?

    <p>Frost wedging</p> Signup and view all the answers

    What contributes to the physical and chemical breakdown of exposed rock?

    <p>Environmental conditions at and near Earth’s surface</p> Signup and view all the answers

    What is the primary function of weathering?

    <p>To break down rock on earth’s surface</p> Signup and view all the answers

    How does weathering affect rock strength and permeability?

    <p>It decreases strength and increases permeability</p> Signup and view all the answers

    What is weathering?

    <p>The breakdown and alteration of rocks at or near the Earth’s surface</p> Signup and view all the answers

    What is the unique property of liquid water that contributes to frost wedging?

    <p>It expands about 9 percent upon freezing</p> Signup and view all the answers

    What contributes to the physical and chemical breakdown of exposed rock?

    <p>Gravity, water, and wind</p> Signup and view all the answers

    What is the primary function of weathering?

    <p>To break down rocks into smaller pieces</p> Signup and view all the answers

    What is the main source of power for mechanical weathering?

    <p>Gravity, water, and wind</p> Signup and view all the answers

    Which type of weathering involves physical forces that break rock into smaller pieces without changing the mineral composition?

    <p>Mechanical weathering</p> Signup and view all the answers

    What does freeze-thaw action or frost wedging mainly involve?

    <p>Expansion of water when it freezes</p> Signup and view all the answers

    What is the process that occurs when moist soils freeze and expand, leading to the growth of ice lenses?

    <p><strong>Frost heave</strong></p> Signup and view all the answers

    How does chemical weathering differ from physical/mechanical weathering?

    <p><strong>Chemical weathering</strong> involves altering the chemical composition of rocks, while <strong>physical/mechanical weathering</strong> only breaks rocks into smaller pieces.</p> Signup and view all the answers

    What contributes to the fragmentation of rock by exerting pressure on it during mechanical weathering?

    <p><strong>Unloading (sheeting)</strong></p> Signup and view all the answers

    What is the end result of mechanical weathering on a rock?

    <p>Many small pieces from a single large one.</p> Signup and view all the answers

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