Chapter 2- Earth's Interior Structure
How dense is the inner core?
13.5 g/cm^3
What is the density of continental crust?
2.7 g/cm3
what is the thickness of the mantle?
2900 km (1800 mi)
What is the density of oceanic crust?
3.3 g/cm^3
What is the thickness of continental crust?
30-60km (22-25 mi) >70 km (40 mi) in some mountainous regions
How thick is the core?
3500 km
What is the temperature range of the mantle?
5,100 F near the core 3,300 F near the crust
What is the temperature range of the core?
5,400 to 12,000 F
What is the thickness of oceanic crust?
5-7 km (5 mi)
What percentage of the earth's volume is the mantle?
80%
What is the composition of oceanic crust?
Basalt
How are earth's layers subdivided?
Based on physical properties of solid/liquid, composition, and density
What change does Moho have? Chemical or physical
Chemical
What are the types of crust?
Continental and oceanic
What creates the asthenophere?
Extreme heat and pressure creates plastic (molten fluid) nature of rock
Why is the outer core important to the Earth's Magnetic Field?
Fluid movement of molten iron generates the magnetic field
What are the remaining mantle's two segments?
Inner core and outer core
Asthenophere
Layer of soft, plastic rock
What is the outer core composed of?
Liquid molten iron-nickel alloy
What sections is the mantle divided into?
Lithosphere and Asthenophere
What is the composition of continental crust?
Many rock types (includes granite)
What changes the velocity of Moho?
Seismic waves
The inner core is made of what?
Solid iron
What is the mantle made of?
Solid layer of peridotite (olivine, iron, magnesium, silicates) with more liquid properties
Lithosphere
Solid uppermost part of the mantle plus the crust, more dense/rigid than asthenosphere
Crust
Thin, solid (brittle) outer layer
Mohorovicic discontinuity (Moho)
boundary between crust and mantle
Interaction between lithosphere and asthenosphere
catalyst for plate tectonics
What are the layers of the earth?
crust, mantle, outer core, inner core
What is the core composed of?
iron and nickel