Download Intro to Plates_Density of Granite_Basalt

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Take out your HW
On your table using the chalk:
 Draw the diagram that shows crust, mantle,
lithosphere, and asthenosphere
 Draw a T chart that compares the thickness and
composition of Oceanic and Continental Crust
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How would you define a plate?
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Archimedes Principle
What is density?
How did Archimedes measure the VOLUME
of the King’s crown?
How might archimedes principle be useful to
geologist in determining the density of the
rocks which make up the earth’s crust?
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GRANITE SAMPLES:
BASALT SAMPLES:
 Africa
 Antarctica
 S. America
 Australia
 Europe
 Asia
1.
Measure the mass of a rock sample to .01 g: __________g
2.
Tie string to rock sample. Carefully lower rock by string into
displacement can.
Record volume of displaced water to 0.1 mL: ________cm3
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This is the volume of the rock sample; remember: (basalt) (granite) 1 mL = 1
cm3
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Calculate density of the rock using formula: D = M/V
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(Density = Mass/Volume).
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Use the values you recorded in steps 1 and 4
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Be sure to label with the density unit: g/cm3
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Show your work on the tables
Which crust is more dense?
What do you expect will happen if continental
crust comes into contact with oceanic crust?
 What if continental crust comes into contact
with continental crust?
 Google Phet simulations
 Search for plate boundaries in the search section
 Play with simulation for 5 minutes
 Make at least three “solid” observations (no pun
intended)
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