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Earth's Processes

Earth's Processes: Ch 2C

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