Download Lecture 3 Review Sheet

Lecture 3: Earth from Core to Crust
Terminology:
Magnetic field, magnetic field lines, geodynamo, solenoid, solar wind, magnetosphere, inner core, outer
core, mantle, crust, asthenosphere, asthenospheric mantle, lithosphere, lithospheric mantle, continental
crust, oceanic crust, the Moho, seismic analysis, seismic shadow zone, lava geochemistry, mantle
xenoliths, peridotite, diamond anvil cell, meteorite composition
Numbers:
Percentages of gases that make up the atmosphere
How far from Earth are 99% of all atmospheric gases found?
What percentage of Earth’s surface is land and what ocean?
Know the thickness of ALL of the Earth’s layers
How thick can tectonic plates get?
What is the relative density of continental and oceanic crust?
How deeply have humans actually drilled (and therefore also reached) into the Earth?
Dates: none
Geography:
Where is the world’s deepest drillhole located? What peninsula?
What state of the US is home to the deepest artificially dug hole?
Review Questions:
Discuss the use of the words geodynamo and solenoid in context of the Earth’s magnetic field
Sketch the layers of the Earth and label them as either solid or liquid, and either brittle or ductile
Explain how earthquake shockwaves are used to “listen to the layers of the Earth”
Which four sources of inquiry (other than seismic analysis) has provided us with information about the
Earth’s layers’ composition?
How are meteorite compositions indicative of the Earth’s core composition?