Transcript Asthenosphere, Lithosphere, Convection

Asthenosphere, Lithosphere,
Convection
Do Now: 6/11
1. What continental drift?
2. What is Pangaea?
1. On your Do Now, copy the diagram below and
label the layers of the Earth.
2. Which layer of the Earth contains the continents we
live on?
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
Guided Notes: 6/11 Tectonic Plates
Lithosphere
-cooler
Asthenosphere
-very hot
-hard, solid rock
-slushy
-contains the crust and hard -causes lithosphere to break
part of the mantle
into tectonic plates
-is what tectonic plates are
made of
-moves tectonic plates
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
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! We’re putting this up in the
classroom!