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Today’s Agenda… Bellringer: Draw a diagram of the Earth. Label the 4 layers. Review Notes on Earth’s Moving Plates Exit Slip Earth’s Moving Plates Study Pack #3 Today’s goals… I can explain how Earth’s plates move. I can explain why Earth’s plates move. Earth’s Plates Earth’s lithosphere is the upper part of the mantle and the crust The lithosphere is broken up into pieces called tectonic plates They float on the mantle Different sizes and shapes Earth’s Plates Earth’s Plates The plates move very slowly About 2cm/year This has caused the position of the continents to change over the years The movement of these plates can also cause changes in Earth’s surface Plate Boundaries The places where the edges of plates meet Plates experience stress at boundaries Convergent Divergent Transform Plate Boundaries Convergent Plates move toward each other Plates experience a type of stress called compression(pushing) The plates crumple up and form mountains Sometimes one plates goes under the other - subduction Plate Boundaries Divergent Plates move away from each other Plates experience a type of stressed called tension(pulling) New crust is formed causing a ridge Plate Boundaries Transform Boundary Plate move past each other A type of stress called shearing occurs This causes faults or cracks in the crust Earthquakes can occur here Why do the plates move? Convection currents in the mantle behave like a conveyor belt to move the plates Exit Slip Identify the plate boundary Convergent Divergent Transform
