is an opening, or rupture in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from the magma chamber below the surface.
What is volcano
100
H2o (You better know this ._.)
What is water
100
Dissolved amounts of viscosity that determines the explosiveness of magma
What is gases :D
100
Magma that is rich in silica forms when the mantle mixes
What is continental crust
100
Molten rock below Earth’s surface
What is magma
200
fragments of pulverized rock, minerals and volcanic glass, created during volcanic eruptions, less than 2 mm (0.079 in) in diameter
What is volcanic ash
200
lines moving towards or meeting at some common point
What is convergent
200
a series of vibrations induced in the earth's crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.
What is earthquakes
200
differing; deviating
What is divergent
200
S-wave causes particles in the ground to move side to side and up and down at right angles
What is secondary wave
300
a broad, domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.
What is shield volcano
300
molten rock
What is lava
300
a dark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite.
What is ANDESITE
300
to make a solution of, as by mixing with a liquid; pass into solution: to dissolve salt in water.
What is DISSOLVED
300
a dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed.
What is PYROCLASTIC FLOW
400
tall, conical volcano built up by many layers (strata) of hardened lava, tephra, pumice and volcanic ash
What is composite volcano
400
a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruptions
What is caldera
400
Geology the point of origin of an earthquake.
What is FOCUS
400
a small area or region with a relatively hot temperature in comparison to its surroundings.
What is HOT SPOT
400
a steep conical hill of tephra (volcanic debris) that accumulates around and downwind from a volcanic event.
What is VISCOSITY
500
a steep conical hill of tephra (volcanic debris) that accumulates around and downwind from a volcanic event.
What is cinder-cone volcano
500
A type of seismic body wave in which rock particles vibrate parallel to the direction of wave travel. Primary waves are alternating lycompressional and extensional, and cause the rocks they passthrough to change in volume. These waves are the fastest traveling seismic waves and can travel through solids, liquids, and gases.Also called P wave . See Note at earthquake.
What is primary wave
500
a twelve-point scale for expressing the local intensity of an earthquake, ranging from I (virtually imperceptible) to XII (total destruction).
What is MERCALLI SCALE
500
the probable building damage, and number of people that are expected to be hurt or killed if a likely earthquake on a particular fault occurs
What is EARTHQUAKE RISK
500
a hard, unreactive, colorless compound that occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.