Today’s Agenda…1/11/13 Bellringer: Compare the Earth’s inner and outer core. Finish Foldable BrainPop on Earth’s Layers Quiz on Monday Begin Notes on Earth’s Plates (SP#3)
Review: What Layer Am I??? Is it getting hot in here or is it just me? I am the hottest of all Earth’s layers. You walk on me all day and you don’t even stop to say hi! Wow! I’m really feeling the pressure. I’m the layer of Earth’s crust that experiences the most pressure!
Review If Earth were a peach, I’d be the part you would like to eat. I’m just below the outer covering, the crust! I share part of my name with another layer. But that guy is always a solid, I just like to go with the flow, I’m a liquid.
Review Erosion changes the way I look, it just wears away at me every year. Do you like your refrigerator magnets? Then thank me! Just call me silly, silly putty. I’m kind of a solid, but I still flow.
Review I don’t have to eat my cereal or take my vitamins……I’m made up of iron! I like to spend my days soaking in the sun and floating around on the hot mantle.
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