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Sculpturing Earth’s Surface

Sculpturing Earth’s Surface. Unit 3: Chapter 4. Big Idea/Essential Questions. Weathering, Erosion and Deposition continuously alter and shape the earth’s surface. Essential Questions How does mass wasting sculpt the earth’s surface?

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Sculpturing Earth’s Surface

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  1. Sculpturing Earth’s Surface Unit 3: Chapter 4

  2. Big Idea/Essential Questions • Weathering, Erosion and Deposition continuously alter and shape the earth’s surface. • Essential Questions • How does mass wasting sculpt the earth’s surface? • Explain how chemical weathering alters materials at the earth’s surface? • ES Standards: 3.1 • SIS Standards 1-4

  3. Key Vocabulary • Chemical weathering • Differential weathering • Eluviation • Horizon • Lahar • Leaching • Mass Wasting • Mechanical weathering • Regolith • Soil Profile • Solifluction • Solum • Spheroidal weathering • Weathering

  4. Earth’s Processes • What are some processes that shape the earth’s surface? • External • Driven by energy from the sun • Breaks apart rock and moves debris • Examples: Weathering, Mass Wasting, Erosion • Internal • Driven by earth’s interior • Gradually forms mountains and volcanic activity • Example: Plate Boundaries

  5. Weathering • What are some examples you have seen of weathering? • 2 types • Mechanical • Chemical

  6. Mechanical Weathering • Smaller pieces without changing composition • Why would smaller pieces weather faster? • Types of • Frost Wedging (aka Frost Action) • Salt Crystals • Unloading (aka Exfoliation) • Biological Activity

  7. Chemical Weathering • Alters composition of rock • Types of • Water • Oxidation • Carbonic Acid

  8. Question of the Day • What factors would influence the rate at which a rock weathers?

  9. Soil • What is soil? • Texture is based on size of particles • Peds give soil structure; determines porosity and permeability of soil • Platy, spheroidal, prismatic, and blocky • What do factors due you think control soil formation? • How is soil eroded? The rate at which it is eroded?

  10. Mass Wasting • What is the driving force behind mass wasting? • What are some triggers of mass wasting?

  11. Classifying Mass Wasting • Type of Motion • Fall • Slides • Flow • Rate of Movement

  12. Types of Mass Wasting • Slump • Rockslide • Debris Flow (aka mudflows) • Earthflow • Creep • Solifluction

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