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reuben kruse ch11 vocab science
Terms in this set (43)
the stress forces that pulls on the crust and thins rock in the middle.
the stress force that squeezes rock until it folds or breaks.
stress that pushes a mass of rock in two opposite directions.
a fault that cuts through rock at a angle, so one block of rock sits over the fault, while the other block lies under the fault.
when blocks move in reverse direction.
the rocks on either side of the fault slip past each other sideways, with little up or down motion.
a large area of flat land elevated high above sea level.
the shaking and trembling that results from movement of rock beneath earths surface.
the area beneath earths surface where rock that was under stress begins to break or move.
the point on the surface directly above the focus.
seismic weaves that compress and expand the ground like an accordion.
seismic waves that can vibrate from side to side or up to down.
move more slowly than P and S waves, but they can produce severe ground movements.
an instrument that records and measures an earthquakes seismic waves.
Modified Mercalli scale
rates the amount of shaking from an earthquake.
a single number that geologist assign to an earthquake based on the earthquakes size.
are based on the earliest magnitude scale.
Moment magnitude scale
geologist use to rate the total energy an earthquake releases.
the record an earthquakes seismic waves produced by a seismograph.
a mountain that forms in earths crust when molten material, or magma, reaches the earths surface.
is a molten mixture of rock - forming substances, gases, and water from the mantle.
when magma reaches the surface.
Ring of fire
one major belt of volcanoes.
the resulting volcanoes sometime create a string of islands.
an area where material from deep within earths mantle rises through the crust and melts to form magma.
beneath a volcano, magma collects.
a long tube that extends from earths crust up through the top of the volcano, connecting the magma chamber beneath's earths surface,
molten rock and gas leave the volcano through the...
the spread of lava as it pours out of a vent.
a bowl- shaped area that may form at the top of a volcano around the central vent is called a...
a material found in magma that form from the elements oxygen and silicon.
the mixture of hot gases, ash,cinders, and bombs that flow down the sides of a volcano when it erupts explosively. is...
a sleeping, volcano or a volcano that scientist expect to awaken in the future and become active.
a dead, volcano is a volcano that is unlikely to ever erupt again.
these materials can build up around the vent in a steep, cone- shaped hill or small mountain that is called...
tall- shaped mountains in which layers of lava alternate with layers of ash.
such lava flows slowly build a wide, gently sloping mountain called...
forms when magma hardens in a volcano's pipe and the surrounding rock later wears away.
magma that forces itself across rock layers hardens into a...
magma that squeezes between boundaries horizontal rock layers harden to form a...
a mass of rock formed when a large body of magma cools inside the crust.
a force tat acts on rock to change its shape or volume.
the hole left when a volcano collapses.
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