Flashcards
Intro to Plate Tectonics
Cards in this deck (44)
- 1What explains earthquakes, mountain belts, volcanoes, "deep sea" trenches, and volcanic ridges?PLATE TECTONICS MUTHAFUCKA
- 2the key difference that defines the core from the mantle is?its chemical position
- 3the key characteristic that defines the lithosphere from the asthenosphere is ?its strength/physical behavior
- 4Why is the Lithosphere above the asthenosphere?b/c Temperature
The interior of the Earth is hot and the temperature decreases towards the surface - 5The approximate thickness of the Lithosphere is?100 Km
- 6What is the radius of the earth?about 6,000km
- 7How deep is the Mariana trench?about 10 Km
- 8What phenomena or features best "outlines" or defines the locations of the plate boundaries on Earth?Earthquakes
- 9How many major plate tectonics are there?12!
- 10What does Plate tectonics say about the plates?That they are moving relative to each other
- 11What is the typical speed of the plate tectonics on Earth?A few inches per year
- 12What are the 3 basic types of plate boundaries?1. Convergent
2. Divergent
3. Transform - 13What is a Convergent Plate Boundary?Aka subduction zones.
Motion towards each other - 14What Plate is this?Divergent.
Motion moving away from each other
- 15What kind of plate boundary is this?Transform.
plates slide past each other
- 16What kind of features do we get when 2 plates move towards each other (Convergent Boundary)?1. Deep ocean trenches
2. huge mountain belts
3. explosive volcanoes
4. large earthquakes - 17Whats an example of an ocean-continent convergent boundary?Cascadia, western U.S.
- 18Whats an example of an ocean-ocean convergent boundary?Marianas trench
- 19Whats an example of Continent-Continent convergent boundary?Himalaya
- 20How many different plates are subducting around the Pacific rim to produce the "Pacific Ring of Fire"?about half a dozen
- 21What type of Plate boundary exists/existed between india and asia prior to their collision?Convergent
- 22The deepest part of the ocean floor, along the Mariana Trench is due to:a depression due to the down bending of the plate as it subducts
- 23The core of the Earth is mostly made up of?Iron
- 24The Arabian Plate is moving roughly northward. On it's west side, where the dead sea is, what type of boundary would you expect?Transform Boundary
- 25What do we get when 2 plates move apart? (Divergent boundary)?undersea mountains and undersea volcanoes (oceanic ridges); some earthquakes
- 26Volcanism at Divergent Boundaries is due to ______ of the mantlePressure release melting
- 27What do we get when 2 plates slide past each other? (Transform Boundary)?Huge faults, large earthquakes
(e.g. San Andreas Fault) - 28What is another example of a Transform Plate?The Dead Sea Transform
- 29A global map of earthquakes would look most like:a map of the tectonic plate boundaries
- 30Why are the Plates moving?Convection in the Earth: The cold (therefore denser) plates want to sink into the asthenosphere (which is a plastic solid, not a liquid)
- 31Why are there volcanoes?-melting when 2 plates move apart ("pressure release")
-melting when one plate sinks back into the Earth (wet-melting) - 32Why are there Earthquakes?"rubbing" of plates against each other
- 33Why are there earthquakes in Missouri?Most plates are not perfect, they have fractures (faults) within the Plate.
- 34What causes hot spots?Mantle plumes!
- 35The volcanism in Hawaii is thought to be caused by?melting due to a mantle plume
- 36What are 3 types of convergent plate boundaries?1. Ocean to Ocean plate collision
2. Continent to Ocean plate collision (aka Subduction zones)
3. continent to continent plate collision - 37what is the mantle made up of?dense "silicates"
- 38whats the crust made up of?lighter silicates oceanic crust & continental crust
- 39What parts of the earth does the lithosphere make up?oceanic & continental crust
& upper most part of the rigid mantle - 40What parts of the earth does the asthenosphere make up?weak mantle
- 41T/F the lithosephere is cooler & stiff & strong.Troooooo
- 42T/F the asthenosphere is weak and flowstroooooooo
- 43Why is the asthenosphere weak and flows and the lithosphere is strong and cooler?b/c rock becomes less strong when its hot and its closer to the earths core which is hot af
- 44how can we measure the motions of plates?GPS (global positioning system of satellites)
Information
- Description
- Geology Flashcards on Intro to Plate Tectonics, created by Corinne Akyildiz on 03/08/2016.
- Created by
- Corinne Akyildiz
- Views
- 1
- Rating