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volcanoes
Term | Definition |
---|---|
Element | a substance that cannot be broken down into other substances. |
Viscosity | Increases as temperature decreases. |
Silcia | a compound made up of particles of the elements oxygen and silicon. |
Pahoehoe | Fast moving,hot lava that has low viscosity. |
AA | Lava that is cooler and slower moving. |
compound | Types of magma of viscosity in its content. |
lava | When magma reaches the surface. |
magma | A complex mixture that has a major ingredient called silica. |
Volcanic ash | formed during explosive eruptions. |
crater | A bowl shaped area around a volcano's central vent. |
vent | Where magma leaves the volcano through an opening. |
pipe | the tube that carries the magma to the opening of the volcano. |
lava flow | a mass flowing of lava. |
extinct | a volcano that is dead or unlike to ever erupt again. |
Dormant | A volcano that is not erupting but is supposed to erupt. |
Active | A volcano that is bound to erupt an explosion. |
Magma chamber | location where lava, |
cinder cone | location where lava,tephra,and gases are stored inside a volcano. |
shield | a gently sloping,wide volcano. |
composite | type of volcano that has smooth flowing lava and sometimes explosions. |
subduction | Edge of a plate of the earth's crust into the mantle beneath another plate. |
caldera | a large volcanic crater. |
batholith | a very large igneous intrusion deep in the earths crust. |
lava plateu | basaltic lava during numerous eruptions. |
sill | solidified lava between layers of rock. |
Dike | A vertical or diagonal layer of solidified lava in cracks of rocks. |
hot spring | a spring of naturally hot water. |
Ring Of Fire | Formed by many volcanoes that rim the Pacific Ocean. |
geyser | surface that releases blowing hot water and steam. |
tephra | fragments and particles ejected by a volcanic eruption. |
stratovolcano | another name for a composite volcano. |