magma
What's it Like When Volcanoes Blow?
Volcanic Eruptions
Types of Volcanoes
100
what is the difference between magma and lava?
magma is under the crust, lava is on top of the crust
100
what are pyroclasts?
solid material expelled from a volcano
100
What type of eruption involves usually extremely viscous lava
highly explosive
100
what are the three types of volcanoes
cinder cone, composite, shield
200
most of the rock inside the earth is in this state (solid, liquid, gas)
solid
200
what gas is released the most from a volcano?
water vapor
200
do lava flows have runny or viscous lava?
runny
200
what are some characteristics of cinder cone volcanoes?
small, abundant pyroclasts, gas-rich lava
300
Magma is forced upward and creates cracks called______
conduits
300
what are the three gases that are released from a volcano?
water vapor, CO2, sulfur dioxide
300
what is one thing that volcano eruptions depend on?
temperature
300
which is the largest type of volcano?
shield
400
what is viscosity?
a liquid's resistance to flow
400
where do volcanoes occur?
plate boundaries and hot spots
400
what is another thing that eruptions depend on?
composition
400
with is the smallest type of volcano?
cinder Cone
500
what is a hot spot? why is it important?
hot spots are areas under the crust where the temperature is hot enough to melt rock. This is where magma forms.
500
what does sulfur smell like?
rotten eggs
500
name characteristics of highly eruptive eruptions and lava flows
highly explosive: abundant pyroclasts lava flows: high temperature
500
do composites have lava flows or explosive eruptions?
both
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