Dynamic Earth

Table Talk

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

How would you define a plate?

TED ed Talk

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?

Which is more dense: basalt or granite?

BASALT SAMPLES: Antarctica Australia Asia

GRANITE SAMPLES: Africa S. America Europe

Calculating Density

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

This is the volume of the rock sample; remember: (basalt) (granite) 1 mL = 1 cm3

Calculate density of the rock using formula: D = M/V ▪ (Density = Mass/Volume).

Use the values you recorded in steps 1 and 4

Be sure to label with the density unit: g/cm3

Show your work on the tables

Oceanic vs. Continental Crust 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)