inside earth by brooke e.. introduction earthquakes are movements or vibrations in the earth. they...
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INSIDE EARTH
By Brooke E.
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IntroductionEarthquakes are movements or vibrations in the Earth. They are
caused the release of stored energy in earth's outer layer.
There is also an instrument that detects, measures, and records
the energy of an earthquake.This is called a
seismograph, and it produces seismograms. Pressure within
the earth can cause rocks in its outer layer to break. These
breaks are called faults. When an earthquake begins, pressure deep within Earth causes rocks along faults to move and break.
As they move, energy is released as vibrations. These vibrations are called seismic
waves. As seismic waves move through Earth and along its
surface, they are felt as shakings and vibrations.
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Primary Waves
Called P wavesFastest waves
First to arrive at a distant point
Travels through solids, liquids, and gases
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Secondary Waves
Called S wavesSlower that P waves
Arrives later at a distant point
Travels through solids only
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Surface Waves
Called L wavesSlowest waves of allFelt at the surface
Causes the most damage
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The layers of the Earth!
Introducing...
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CrustThinnest layer
Grass, dirt, and sandContains oxygen
Deeper under continents than oceans
Earth's most outer layerWe live on it
Solid rockThe thin yellow
layer is the crust
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MantleThickest layer
Layer of rock lying below the crust
Allows tectonic plates to slowly move
Rocks move or flow due to pressure and high
temperatures
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Outer coreMade of melted iron
Totally liquidInner core floats in this
layer
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Inner core
Solid sphereCenter of the earth
Spins at a different rate than the rest of the
planet
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Earthquake
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Fault
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Tectonic plates
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Richter scale
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Seismograph/Seismogram
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CrustThe
yellow section
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MantleThe red
layer
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Outer coreThe yellow layer is the...
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Inner coreThe layer that is the center of the earth