click below
click below
Normal Size Small Size show me how
volcano test for bri
volcano test
Question | Answer |
---|---|
shield volcano | gently sloping mountain. forms when a volcano errupts quietly. thin layers of lava build up slowly over a large area around the vent. |
cinder cone | steep cone shaped hill. it forms when a volcano errupts explosivly. ashes, cinders and bombs pile up around the vent. |
composite volcano | is a tall cone shaped mountain. it forms when a volcano errupts quietly the explosivly.layers of lava are followed by layers of ash, cinders, and bombs. |
caldera | when a volcano collpses it leaves a huge hole. |
cinder cone volcano | the boundries are hot spot, divergent or convergent. |
composite volcano type of boundaries | convergent |
shield volcano type of boundary | divergent |
active volcano | has lots of energy in it and this happens when a volcano is currently in action. |
extinct | no longer errupts |
dormant | hasnt errupted in a long time |
low viscosity | thin and runny lava |
high viscosity | thick and chunky |
pahoehoe | fast moving thin and hot lava |
Aa | slow moving thicker and cooler lava. |
magma | thick and sticky |
pyroclastic flow | creates bombs, ash and lava. |
hot spring | forms when groundwater heated by magma rises to the surface and collects in a nataural pool. |
geyser | is a fountain of water and steam that errupts from the ground. |
silica | magma contains silica.magma that contains more silica has a higher viscosity. |
hot spot | is a place where material rises from deep in the mantle. the material forms magma. |