inside the earth by:jaron. what is a seismic wave a seismic wave is when pressure from the earth...
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Inside the EarthBy:Jaron
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What is a seismic wave
• A seismic wave is when pressure from the earth causes rocks along faults to move and break.There are 3 types of seismic waves
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What is an earthquake
• A earthquake is a movement or vibration of the earth. They are caused by the release of stored energy in earths outer layer.This release of energy causes sudden shifts of rocks along faults
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Tectonic Plates
The earth is like a big cracked egg. On earth
there are 7-8 major tectonic plates and many
mirror plates.
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All about faultsWhen rocks found along a
break move, the break is called a fault.Around the tectonic plates there are
faults. Earthquakes happen around faults.
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Primary Waves• Also known as P
waves.
• The primary wave is also the fastest waves.
• It is first to arrive at a distant point.
• It can travel through solids,liquids,and gases.
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Secondary Waves• Also known as S
waves
• They are slower than P waves
• And they arrive later at the distant point.
• Travels through solid only
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Surface Waves
• Also known as L waves
• They are the slowest but they cause the most damage
• They are felt at the surface
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Seismographs
• A seismograph is a tool that helps scientist record the force and duration of an earthquake.It records the information on a seismogram.
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What is earths
structureThere are 4 parts to the earth.The 4 parts of the
earth are:crust,mantle,outer core,and Inner core.
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Crust
• The crust is earths outer layer
• It is also the thinest layer and we live on it.
• It is deeper under continents then oceans
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Mantle
• The mantle is the thickest layer.
• It is a layer of rock lying below the crust.
• Also it is allows tectonic plates to move slowly.
• Rocks move or flow due to high temperatures.
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The Core• The core is split into two
parts inner and outer
• The outer core is made of melted iron.It is totally liquid and the inner core floats in it.
• The inner core is a solid sphere.It is the center of the earth. It spins a different rate than the rest of the planet.