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30 Cards in this Set
- Front
- Back
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The Place inside the earth's surface where the earthquake starts is the
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focus
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The spot on land directly above the focus is the
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epicenter
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The major eartquake and volcano zone in the world is the
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Ring of Fire
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A wave that causes particles to move back and forth is a
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primary wave
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A wave that causes the most destruction as a
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surface wave
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A wave that causes particles to move at right angles to the direction of the wave is a
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secondary wave
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Magma on the earth's surface is called
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lava
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A huge wave caused by an underwater earthquake is a
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tsunami
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A break in the earth's surface is called a
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fracture
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A break in the earth's surface where movement has occurred is a
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fault
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When the continents were joined together as one, it is called
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Panguea
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When one plate slides under another it is called
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subducting
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An underground pocket of molten rock is called
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magma chamber
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what is an idea supported by evidence over time called?
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theory
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Oceanic crust is ---------- than contintental crust
thicker/thinner |
thinner
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What measures the magnitude of an earthquake?
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seismograph
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---------plates cause sea-floor spreading
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divergent
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what plates cause volcanoes?
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convergent
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Earthquakes occur at what kind of boundaries?
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transform
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What is the theory that the earth's surface is broken into plates?
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plate tectonics
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A volcano with gentle sides
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shield
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A volcano with alternating layers of lava, rocks, and ash is
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composite
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A volcano that has steep sides and a narrow base and is caused by a violent eruption is a
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cinder cone
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A volcano that has its top blown off and is filled with water is a crater lake or a
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caldera
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The seismic wave that travels the fastest is
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primary
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The fault caused by compression when rock pushes up is a
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reverse fault
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The eartquake scale that assigns a decimal to an earthquake based upon a seismograph is
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Richter Scale
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A fault caused by tensional forces when rock falls down is a
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normal fault
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The earthquake scale that assigns a Roman numeral to an earthquake based upon people's opinions is the
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Mercalli Scale
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The seismic wave that does the most damage is
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reverse fault
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