Earthquakes and volcanos
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| lava vent | systems of tunnels that funnel lava outward along the sides of a volcano
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| Earthquakes | the violent, rapid shaking of the earth caused by a rupture in its crust.
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| Seismic waves | energy released by an earthquake that travels through the earth in the form of waves.
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| p-waves | a seismic wave produced at the focus of an earthquake that is the fastest of all seismic waves and can travel through all states of matter.
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| s-waves | a seismic wave generated at the focus of an earthquake that travels in the form of a wave and can only pass through solids.
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| surface waves | a seismic wave formed from the interaction of other seismic waves at the earth's surface caused by an earthquake, which causes the ground to move in a wavelike rolling motion.
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| focus | the point in the earth's crust where a rock mass is broken or moved causing an earthquake.
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| epicenter | the point on earth's surface directly above the focus of an earthquake.
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| volcano | marks a point on the earth's surface where hot molten rock, or lava flow from beneath earth's surface
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| lava | hot, molten rock that flows freely on the earth's surface.
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| magma chambers | tubes, tunnels or large cavities in the earth's crust through which magma travels or collects.
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| eruption | the sudden release of lava or pyroclastic material from a volcano.
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| caldera | large crater caused by a violent volcanic eruption.
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| pyroclastic flow | rapidly moving flow of extremely hot gases, water, ash and debris that is ejected from a volcano during an eruption.
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| lahars | a rapid flow of mud and debris formed from the rapid melting of snow and ice associated with a volcanic eruption.
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