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Description
Flashcards by Corinne Akyildiz, updated more than 1 year ago
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Created by Corinne Akyildiz
over 8 years ago
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| Question | Answer |
| What explains earthquakes, mountain belts, volcanoes, "deep sea" trenches, and volcanic ridges? | PLATE TECTONICS MUTHAFUCKA |
| the key difference that defines the core from the mantle is? | its chemical position |
| the key characteristic that defines the lithosphere from the asthenosphere is ? | its strength/physical behavior |
| Why is the Lithosphere above the asthenosphere? | b/c Temperature The interior of the Earth is hot and the temperature decreases towards the surface |
| The approximate thickness of the Lithosphere is? | 100 Km |
| What is the radius of the earth? | about 6,000km |
| How deep is the Mariana trench? | about 10 Km |
| What phenomena or features best "outlines" or defines the locations of the plate boundaries on Earth? | Earthquakes |
| How many major plate tectonics are there? | 12! |
| What does Plate tectonics say about the plates? | That they are moving relative to each other |
| What is the typical speed of the plate tectonics on Earth? | A few inches per year |
| What are the 3 basic types of plate boundaries? | 1. Convergent 2. Divergent 3. Transform |
| What is a Convergent Plate Boundary? | Aka subduction zones. Motion towards each other |
| What Plate is this? | Divergent. Motion moving away from each other |
| What kind of plate boundary is this? | Transform. plates slide past each other |
| What 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 |
| Whats an example of an ocean-continent convergent boundary? | Cascadia, western U.S. |
| Whats an example of an ocean-ocean convergent boundary? | Marianas trench |
| Whats an example of Continent-Continent convergent boundary? | Himalaya |
| How many different plates are subducting around the Pacific rim to produce the "Pacific Ring of Fire"? | about half a dozen |
| What type of Plate boundary exists/existed between india and asia prior to their collision? | Convergent |
| The 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 |
| The core of the Earth is mostly made up of? | Iron |
| The 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 |
| What do we get when 2 plates move apart? (Divergent boundary)? | undersea mountains and undersea volcanoes (oceanic ridges); some earthquakes |
| Volcanism at Divergent Boundaries is due to ______ of the mantle | Pressure release melting |
| What do we get when 2 plates slide past each other? (Transform Boundary)? | Huge faults, large earthquakes (e.g. San Andreas Fault) |
| What is another example of a Transform Plate? | The Dead Sea Transform |
| A global map of earthquakes would look most like: | a map of the tectonic plate boundaries |
| Why 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) |
| Why are there volcanoes? | -melting when 2 plates move apart ("pressure release") -melting when one plate sinks back into the Earth (wet-melting) |
| Why are there Earthquakes? | "rubbing" of plates against each other |
| Why are there earthquakes in Missouri? | Most plates are not perfect, they have fractures (faults) within the Plate. |
| What causes hot spots? | Mantle plumes! |
| The volcanism in Hawaii is thought to be caused by? | melting due to a mantle plume |
| What 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 |
| what is the mantle made up of? | dense "silicates" |
| whats the crust made up of? | lighter silicates oceanic crust & continental crust |
| What parts of the earth does the lithosphere make up? | oceanic & continental crust & upper most part of the rigid mantle |
| What parts of the earth does the asthenosphere make up? | weak mantle |
| T/F the lithosephere is cooler & stiff & strong. | Troooooo |
| T/F the asthenosphere is weak and flows | troooooooo |
| Why 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 |
| how can we measure the motions of plates? | GPS (global positioning system of satellites) |
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