Plate tectonics Year 1 science.

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Presentation transcript:

Plate tectonics Year 1 science

review ________ ___________Theory of ______________Drift was rejected because he couldn’t prove ________ the continents were moving apart. It wasn’t until after Wegener died that ________ Hess soon claimed the reason behind Continental Drift… _______________________

review Alfred Wegener’s Theory of Continental Drift was rejected because he couldn’t prove WHY the continents were moving apart. It wasn’t until after Wegener died that Harry Hess soon claimed the reason behind Continental Drift… SEA FLOOR SPREADING

New Theory Scientists used this information to come up with a new theory: The Theory of Plate Tectonics The lithosphere is made of huge plates that are in constant, slow motion, driven by convection currents in the mantle.

Effects As the plates move and collide, plate boundaries are formed. There are 3 different types: Convergent Divergent Transform

Divergent boundaries Boundaries where plates pull apart

Convergent boundaries Boundaries where plates come together

Transform boundaries A boundary in which 2 plates scrape past each other in opposite directions

How it works! Plate Tectonics