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CHAPTER 5: EARTH DYNAMICS. LESSON 1: FORCES THAT SHAPE EARTH.

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Presentation on theme: "CHAPTER 5: EARTH DYNAMICS. LESSON 1: FORCES THAT SHAPE EARTH."— Presentation transcript:

1 CHAPTER 5: EARTH DYNAMICS

2 LESSON 1: FORCES THAT SHAPE EARTH

3 Essential Questions  How do continents move?  What forces can change rocks?  How does plate motion affect the rock cycle?

4 Vocabulary  Isostasy  Subsidence  Uplift  Compression  Tension  Shear  Strain

5 Plate Motion  Mountain ranges are produced by plate tectonics  Earth’s surface is broken into rigid plates that move horizontally on Earth’s more fluid upper mantle  How are the Rocky Mountains different from the Appalachian Mountains?

6 Vertical Motion  Balance in the Mantle  Isostasy is the equilibrium between continental crust and the denser mantle below it  Subsidence and Uplift  Subsidence is the downward vertical motion of Earth’s surface  Uplift is the upward vertical motion of Earth’s surface

7 Horizontal Motion  Types of Stress  Squeezing stress is compression, stress that pulls something apart is tension and parallel forces acting in opposite directions are shear  Types of Strain  A change in the shape of rocks caused by stress is called strain. We have elastic strain and plastic strain  Deformation in the Crust

8 Plate Tectonics and the Rock Cycle

9 Homework  Textbook: Page 154 #1, 2, 3, 4, 5, 6, 7 & 9  Write down question and answer  Workbook: Page 158, 160, 161


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