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Today’s Agenda…1/20 

Today’s Agenda…1/20 . Bellringer: How do weathering and erosion change the surface of the Earth? Turn in worksheets Notes on Constructive and Destructive Forces Before/After Landscape Assignment. Weathering. What is weathering? What are the two types of weathering?

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Today’s Agenda…1/20 

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  1. Today’s Agenda…1/20  • Bellringer: How do weathering and erosion change the surface of the Earth? • Turn in worksheets • Notes on Constructive and Destructive Forces • Before/After Landscape Assignment

  2. Weathering • What is weathering? • What are the two types of weathering? • Give an example of mechanical weathering. • Give an examples of chemical weathering.

  3. Erosion • What is erosion? • What are the agents of erosion?

  4. Forces That Shape Our Earth Study Pack #10

  5. Today’s Goals… • I can describe constructive and destructive forces • I can identify examples of constructive and destructive forces

  6. Think about it!  • How is the surface of the Earth changing everyday?

  7. Forces • The surface of the Earth is constantly changed by constructive and destructive forces

  8. Constructive Forces • Build up the Earth’s surface • Types of constructive forces: • Crustal deformation • Volcanic eruptions • Deposition of sediment

  9. Crustal Deformation • The movement of plates builds landforms such as volcanoes and mountains

  10. Volcanic Eruptions • As lava erupts onto the Earth’s surface it cools to form new layers of rock which build up the Earth’s surface

  11. Deposition of Sediments • As sediments are carried away and laid down they build up landforms • This is called deposition • Example: Sand dunes, deltas, sandbars

  12. Destructive Forces • Wear down Earth’s surface • Types of destructive forces: • Weathering • Erosion

  13. Erosion Changes Earth’s Surface • Rock and sediments are moved from one place to another • Where material is removed, canyons and valleys form

  14. Homework… • You are going to draw a before and after picture of a landscape • At least one constructive OR destructive force will cause a change in your landscape over time • The before picture shows what the landscape first looked like • The after picture shows what it looked like after the constructive or destructive force changed it

  15. Homework… • Write 1 paragraph to explain what happened to your landscape over time and what caused it to change • You will want to include terms such as: constructive force, destructive force, erosion, weathering, volcanic eruptions, deposition, crustal deformation, plate movement

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