three layers of the Earth
continent-sized slabs in which the Earth's crust and upper mantle are broken into
3 ways plates can move together by
past each other, toward each other, away from each other
a vibration or shaking of the Earth's crust
where most earthquakes occur, which is where crust along which rock move
what causes an earthquake?
the sudden build up and release of energy in rocks
How do many earthquakes happen?
where plates are moving past each other
the point where the movement of an earthquake first took place
the point on the surface right above the focus
an instrument that records earthquake waves
measures the movement and the damage that the earthquake has caused
measures the energy that is released during an earthquake
a mountain that forms when red-hot melted rock flows through a crack onto the earth's surface
melted rock inside the Earth
melted rock that reaches the Earth's surface
a rocky opening in which magma flows onto the surface through to form volcanic mountains
why don't volcanic mountains look the same?
because each type of eruption forms a different type of mountain
large mountains with gentle slopes
cinder cone volcanoes
small volcanoes made up of hardened lava chunks and have steep sides
mediun sized mountains with steep peaks and gently sloping sides
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