1. Q2 Earth’s oceanic crust is less than 180 million years old and about 20 km thick. The continental crust is 2 billion years old and 50 km thick. Use what you know about sea floor spreading to explain why they are different.

3. Plate Tectonics: We Didn't Start the Fire Either!

4. Mt St Helen

5. Dante’s peak

6. Today’s objective
I understand how earthquakes are caused and transfer energy through the Earth. With this knowledge I am able to prepare for and minimize their damage.

7. All iron aligns in
the same direction

8. All iron aligns in
the same direction

9. Paleo magnetism: The reversal of the direction of the magnetic poles of Earth

10. Investigating Paleo magnetism
& the Ocean Floor