Definitions Pt.1
Volcano
a weak spot in the crust where magma comes to the surface
Active
when a volcano is either erupting or expected to erupt in the near future
what is a cinder cone volcano
it is a small, cone-shaped volcano made of broken rocks or blobs of hardened lava that gather around the vent.
what two major landscapes do eruptions form
Islands and Mountains
what is the Ring of fire
it is where 75% of the worlds volcanoes are located in the Pacific Ocean
Lava
what magma is called when it reaches the surface
Dormant
when a volcano is not erupting but expected to erupt in the future
Island Arc
are a sting of islands created by a erupting volcano
what do you call a person who studies volcanoes
Volcanologist
Magma is hotter the more ________ it has.
fluid
Magma
a melted mixture of rock-forming substances and gases from the mantle
Extinct
when a volcano is no longer going to erupt.
Caldera
is a massive hole left by the collapse of a volcano
what type of rock is formed after a volcanic eruption
An igneous rock
More ___ = more violent eruption.
gas
Magma chamber
is the area that is located underneath the volcano where the magma collects
Crater
a bowl-shaped area that forms on top of the volcano.
convection current
a current caused by the rising of heated fluid and sinking of cooled fluid
what causes an explosive eruption
It happens when the magma dries before it leaves the volcano. When that happens all of the pent up magma causes the volcano to explode.
name at least three of these hazards
things burning, volcanic gas, bombs and cinders, ash can damage crops and cause damage to cars, landslides, and avalanches of mud.
vent
the opening in the volcano where molten gas and rock are distributed
Hot Spring
is an area where material from within the mantle rises and then melts
Where volcanoes occur
divergent and convergent boundaries
why do volcanic eruptions effect the climate.
The effect the climate because the ash and dust goes into the atmosphere preventing suns energy from reaching the earth, therefore causing a cooler climate.
what are the three types of volcanoes
a shield volcano, a composite volcano, and a cinder cone volcano