Tectonic Plate Theory

• What are the 4 layers of the Earth?


  Crust, mantle, outer core, inner core
• Name the layer of the Earth represented by the black label

  Crust

  
• Name the layer of the Earth represented by the blue label

  Outer core

  
• Name the layer of the Earth represented by the yellow label

  Mantle

  
• Name the layer of the Earth represented by the red label

  Inner core

  
• Name the layers of the Earth in order from the inside to the outside

  Inner core, outer core, mantle, crust
• Name the layers of the earth from the outside to the inside:

  Crust, mantle, outer core, inner core
• What happens in the mantle that causes plate movement?

  Convection currents caused by heat from the core
• What are tectonic plates?

  Large slabs of the Earth’s crust that float on the mantle and move due to convection currents
• What is the difference between continental and oceanic crust?

  Continental crust is thicker and less dense; oceanic crust is thinner and denser
• What fossil evidence supports plate tectonic theory?

  Same fossils found on different continents
• How does the shape of continents support the theory?

  Continents fit together like a jigsaw puzzle (e.g. Africa and South America)
• How does seafloor spreading support the theory?

   Rocks are older the further they are from mid-ocean ridges