Earth's Processes: Ch 2C
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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| compares the strengths of earthquakes using a range of numbers from 2-9 | Richter scale
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| a large mass of slowly moving ice that gravity causes to move downhill gradually, shaping the land in many ways | glacier
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| an instrument used by people who study earthquakes to record vibrations | seismograph
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| formed when one plate sinks under another, forcing magma up through an opening in earth's crust and out onto earth's surface | volcano
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| the point at which rock first breaks or moves, causing an earthquake | focus
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| layer of impermeable rock where groundwater can accumulate & flow freely | aquifer
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| heated water that rises to the surface & erupts in a fountain of hot water & steam | geyser
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| dark-colored matter in the soil formed when dead plants & animals decay | humus
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| crack in the earth's crust along which rock layers move | fault
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| processes that gradually break rock down into smaller & smaller fragments | weathering
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| formed when a glacier melts and deposits its sediments at the base of a mountain | moraine
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| theory which states that the lithosphere is made up of a series of larger & smaller plates that fit together like puzzle pieces | plate tectonics
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| rocks & soil that have eroded away from riverbeds & are carried along by the river, helping to sculpt or mold the land | sediments
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| fossil of an organism that existed on earth for a short time over a wide area | index fossil
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| solid layer of earth's crust that floats in plates on a layer of melted rock | lithosphere
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| 1st layer of the soil profile | topsoil
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| most frequently occur along plate boundaries when plates shift due to a build-up of pressure under the plate | earthquakes
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| most frequently occur along cracks in earth's crust which are formed when one plate is subducted under another | volcanos
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| 2nd layer of the soil profile | subsoil
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| point along a fault where rock first breaks or moves, causing an earthquake | focus
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| all earth's continents were once thought to have been part of this single supercontinent | pangaea
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| circle of volcanos surrounding the Pacific Ocean | Ring of Fire
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| reason why earth appears to be older than it is | God created it with age
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| 3rd layer of the soil profile | bedrock
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