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Plates-Connor A.

Stack #132763

Asthenosphere plasticlike layer of Earth on which the lithospheric plates float and move around.
Cinder cone volcano steep-sided, loosely packed volcano formed when tephra falls to the ground.
Composite volcano volcano built by alternating explosive and quiet eruptions that produce layers of tephra and lava; found mostly where Earth's plates come together and one plate sinks below the other.
Continental drift Wegener's hypothesis that all continents were once connected in a single large landmass that broke apart about 200 million years ago and drifted slowly to their current positions.
Convection current current in Earth's mantle that transfers heat in Earth's interior and is the driving force for plate tectonics.
Crater steep-walled depression around a volcano's vent.
Earthquake vibrations produced when rocks break along a fault.
Epicenter point on Earth's surface directly above an earthquake's focus.
Hot spot the result of an unusually hot area at the boundary between Earth's mantle and core that forms volcanos when melted rock s forced upward and breaks through the crust.
Lithosphere rigid layer of Earth about 100 km thick, made of the crust and a part of the upper mantle.
Pangaea large, ancient landmass that was composed of all the continents foined together.
plate tectonics theory that Earth's crust and upper mantle are broken into plates that float and move around on a plasticlike layer of the mantle.
plate a large section of Earth's oceanic or continental crust and rigid upper mantle that moves around on the asthenosphere.
primary wave seismic wave that moves rock particles back-and-forth in the same direction that the wave travels.
Seafloor spreading Hess's theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge.
Secondary wave seismic wave that moves rock particles at right angles to the direction of the wave.
Seismograph instrument used to register earthquake waves and record the time that each arrived.
Shield volcano broad, gently sloping volcano formed by quiet eruptions of basaltic lava.
surface wave seismic wave that moves rock particles up-and-down in a backward rolling motion and side-to-side in a swaying motion.
tephra bits of rock or solidified lava dropped from the air during a explosive volcanic eruption; ranges in size from volcanic ash to volcanic bombs.
Vent opening where magma is forced up and flows out onto Earth's surface as lave, forming a volcano.
Volcano opening in Earth's surface that erupts sulfurous gases, ash, and lava; can form at Earth's plate boundaries, where plates move apart or together, and at hot spots.
Created by: Connor Angelo