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Astenosphere
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Continental Drift
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unit 5-tectonics

QuestionAnswer
Astenosphere weak plastic like layer below the lithosphere
Continental Drift Hypothesis that the continents were once joined together and they have slowy drifted apart
Convection Transfer of heat through liquids
Convergent Boundary Boundary where two plates come together
P-wave Wave created by an earthquake that pushes and pulls rock in the direction of the wave
S-wave Wave created by an earthquake that shakes particles perpendicular to the wave.
Divergent Boundary An area where the plates are moving apart, common in oceanic ridges.
Earthquake The vibration of the Earth as a result of a rapid energy release.
Epicenter Location on Earth's surface directly above the focus (where the earthquake originated)
Fault A fracture or break in the Earth where movement has occurred.
Focus Point within the earth where an earthquake originates
Hotspot Area of high heat in the mantle that produces magma that rises to the Earth's surface (Hawaiian Islands)
lithosphere Rigid outer layer of the Earth which includes the upper mantle and crust.
magnitude How strong and earthquake was.
mantle The thick layer below the Earth's Crust.
mid-ocean ridge Formed where oceanic plates separate and rising magma cools to form new ocean crust
Pangea Large landmass that was made up of all the continents.
Plate Boundary The area where two plates meet
Plate Tectonics Theory that states that the earth's crust and upper mantle are broken into plates that "float" and move around.
Sea-floor spreading Hess's theory that new seafloor is formed when magma is foced upward at a mid-ocean ridge.
Seismograph Instrument used to measure earthquake waves.
subduction zone Where oceanic and continental plates collide and the oceanic plate plunges beneath the continental plate.
Transform Boundary A boundary where two plates slide past each other.
Trench
Created by: toddjones
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