Earthquakes
The vibrations in the ground that result from movement along breaks in Earth's lithosphere.
What is an earthquake?
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Scientists who study earthquakes.
What are seismologists?
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A vent in Earth's crust through which melted or molten rock flows.
What is a volcano?
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Volcanoes that erupt very violently and explosively.
What are supervolcanoes?
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The main chemical compound in all magmas.
What is silica?
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A break in Earth's lithosphere where one block of rock moves toward, away from, or past another.
What is a fault?
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Instrument that that measures and records ground motion and can be used to determine the distance seismic waves travel.
What is a seismometer?
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Molten rock below Earth's surface.
What is magma?
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Common along divergent plate boundaries and oceanic hot spots.
What are shield volcanoes?
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Tiny particles of pulverized volcanic rock and glass are high into the atmosphere.
What is volcanic ash?
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When a force such as pressure is applied to a rock along plate boundaries, the rock can change shape. This is called?
What is rock deformation?
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A graphical illustration of seismic waves.
What is a seismogram?
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Molten rock that erupts onto Earth's surface.
What is lava?
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Large, steep-sided volcanoes that result from explosive eruptions of lava and ash along convergent plate boundaries.
What are composite volcanoes?
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A liquid's resistance to flow.
What is viscosity?
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Energy that travels as vibrations on and in Earth.
What are seismic waves?
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A method that is used to find an earthquake's epicenter.
What is triangulation?
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Volcanoes that are not associated with plate boundaries.
What is a hot spot?
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Small, steep-sided volcanoes that erupt gas-rich, basaltic lavas.
What are cinder cones?
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A moving, molten stream of magma that erupts from a volcanic vent and flows downhill, solidifying into rock as it cools.
What are lava flows?
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A seismic wave that causes particles in the ground to move up and down in a rolling motion.
What are surface waves?
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The speeds of seismic waves depend on?
What is the temperature, pressure, and chemistry of the rocks they travel through?
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Magma forms when one plate sinks beneath another plate.
What is subduction?
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A large volcanic depression formed when a volcano's summit collapsed or was blown away by explosive activity.
What is a caldera?
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The deposit of fine-grained volcanic rock, minerals, and glass fragments.
What is ash fall?
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