Asthenosphere, Lithosphere, Convection

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Asthenosphere, Lithosphere, Convection
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Do Now 6/11

1. What continental drift?
2. What is Pangaea?

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1. On your Do Now, copy the diagram below and label
   the layers of the Earth.

1. Which layer of the Earth contains the continents
   we live on?

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Guided Notes 6/11 Tectonic Plates

• A tectonic plate is made of the lithosphere.
• The lithosphere is crust (oceanic or
  continental) connected to a hard rock layer
  below
• Tectonic plates are moved by the asthenosphere
• The asthenosphere is a slushy part of the Upper
  Mantle

--10 km
--100 km
--200 km
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Guided Notes 6/11 Tectonic Plates
Lithosphere Asthenosphere
-cooler -hard, solid rock -contains the crust and hard part of the mantle -is what tectonic plates are made of -very hot -slushy -causes lithosphere to break into tectonic plates -moves tectonic plates
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Guided Notes 6/11 Tectonic Plates

• Convection- the cycle of heat rising and cold
  material sinking (think of boiling water)

Tectonic plates move because of convection of the
asthenosphere acts like wheels rolling them around
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Drawing Assignment

• 1. Draw a diagram of a tectonic plate. Include
  both oceanic and continental crust, and arrows
  showing the convection of the asthenospher
  (Figure 8, pg. 400).
• Label continental crust, oceanic crust,
  lithosphere, asthenosphere, convection arrows
• Make it look good! Were putting this up in the
  classroom!