Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
What is the Earth's Inner Core?
|
-Solid
-Very Hot! -Mostly Iron |
|
|
What is Earth's Outer Core?
|
-Liquid
-Mostly Iron |
|
|
What is the Earth's Mantle?
|
-Solid
-Mostly Iron and Magnesium rocks |
|
|
What is the Earth's Crust?
|
-Outer Rock Layer
-Moho Discontinuity (light crust rocks are separated from mantle) |
|
|
What is the Earth's Lithosphere?
|
-Cool outer layer of the Earth
|
|
|
So is the Asthenosphere the Lithosphere?
|
Yes, it's underneath it and is a hot slowly flowing layer of rock
|
|
|
Difference between Ocean Crust and Continental Crust?
|
Ocean crust is more dense, thinner, and younger
|
|
|
What does less dense magma do that more dense magma doesn't?
|
Rises
|
|
|
How do we know about Earth's structure?
|
Seismology?
|
|
|
What part of the Earth does plate tectonics affect?
|
The Lithosphere
|
|
|
What does Divergent mean in terms of Plate boundaries?
|
-When moves away and lava comes up the middle
-Usually Oceanic |
|
|
What does an ocean-continent convergent boundary do?
|
Ocean plate sinks below and forms volcanic and earthquake activity or mountain ranges and a subduction zone.
|
|
|
What does an ocean-ocean convergent boundary do?
|
Older plate sinks below younger and forms deep trenches, a subduction zone and earthquakes/volcano activity ensues.
|
|
|
What does a continent-continent boundary do?
|
Neither plate sinks and compression occurs. Forms high mountain chain and triggers earthquakes.
|
|
|
What about Transform boundaries with ocean-ocean and continent to continent?
|
Plates slide past each other and earthquakes are common.
|
|
|
How fast do plates move?
|
A few centimeters per year
|
|
|
Who discovered mid ocean ridges?
|
Harry H. Hess
|
|
|
What is Paleomagnetism and what does Curie Point have to do with it?
|
Iron-bearing minerals orient themselves parallel to
the magnetic field at the critical temperature known as Curie Point and Paleomagnetism is the study of these minerals/rocks. |
|
|
Volcanic rocks have reversed direction. True or False?
|
True. Reversals occur every few thousand years.
|
|
|
What is ridge push?
|
The gravitational push away from the crest of mid ocean ridges
|
|
|
What is it called when the cool, dense ocean plate sinks into the hot asthenosphere?
|
Slab pull
|
