Earth Science Plate Tectonics
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What is a Convergent Boundary?
Also known as a subduction zone. Oceanic crust subducts beneath the continental crust and create trenches. Cause large Earthquakes. When continental plates collide, they fold and mountains build.
What is a Divergent Boundary?
Occur in mid ocean ridges/rises. When 2 plates seperate. New magma seeps up to fill he open space between the plates.
What is a transform boundary?
Where the boundaries slide against each other. Forming faults.
Convection moves plates (at very slow speeds)
Heat that escapes the earth's core causes convection. Where it is stable and stationary, it forms a ____.
Volcanoes form along _______ and at ______
They form along plate boundaries and at hot spots. The volcano goes extinct as it moves off of the hot spot.
Faults are weaknesses in between rocks. When plates move against fault lines ____________.
The epicenter is the point at the surface above the ____.
Focus. It is wheere the most damage occurs.
Point underground where the rocks slip and cause an earthquake.
Earth produces 2 main waves. They are _______
P waves and S waves.
- Go through liquid
- Can't travel through liquid, or the center of the Earth. Therefore, Earth's outer core is a liquid.
- Side winding
Area where no seismic waves are felt.
Where the crust and mantle meet. Where seismic waves change speed.
Giant ocean waves from underwater earthquakes.
Know how to use the P wave and S wavee chart in the Refence Tables!!!! HHUUGGEE!!
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