Note Sheet - Earthquakes Chapter 8 (old textbook Ch 6)
8.1 What is an Earthquake?
1. Define earthquake - a vibration of earth due to rapid energy
Review the layers of the Earth’s interior see blue textbk p. 235 (older purple textbk, p. 175)
Physical Chara.
lithosphere - soli
asthenosphere - semi-
Descriptions:
Chemical Characteristics)
Continental Crust - thick,
low density, mostly granitic
quartz & feldspar, Si and O,
Oceanic Crust - thin, high density,
mostly basalt, olivine & pyroxene
Mg and Fe
#4 Mantle - very dense
core
#5 Outer core - peridotite rock, Si, O
and Mg
#6 -Inner core - almost pure