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The dynamic EARTH
Term | Definition |
---|---|
Crust | the layer of earth we live on |
Mantle | the layer of melted rock under the Crust |
Inner core | the solid layer in the middle of the earth |
Outer core | the layer that has all four states of matter |
Magma | melted rock underneath the earths surface |
Molten | melted |
tectonic plates | Plates which are under the mantle ,which constantly move |
compression | tectonic plates pushing together |
shearing | tectonic plates rubbing past each other |
tension | tectonic plates pulling apart |
seismic wave | wave above the earth's surface |
p wave | type of seismic wave ,however' fastest moving |
s wave | type of seismic wave ,however, slowest moving wave [moves like a snake |
surface wave | travel along the surface |
epicenter | the point directly above the hypocenter where earthquakes happen |
focus/hypocenter | where the plates meet |
seismograph | how earthquakes are measured |
tsunami | earthquake in the ocean |
mercalli scale | measures by the amount of distruction |
Richter scale | rated using seismograph |
moment magnitude scale | estimates the amount of energy released by earthquake |