Trivia
What is the molten rock under the earth's crust?
magma
What is it when an eruption flows through the side of the mountain?
flank eruption
What country did Mt. Vesuvius erupt?
Italy
Which volcano is not cone shaped?
shield
What is another word for volcanic fog?
vog
What does thermal mean?
refers to heat
Who studies volcanoes?
volcanologist
true
Where do you find most volcanoes?
under the ocean
How are shield volcanoes formed?
continuous flowing lava
true or false...Lava is the most dangerous part of a volcano.
false
What is a heated pool of ground water?
hot spring
What is it when molten rock reaches the surface?
lava
What is clouds filled with jagged bits of crushed rock?
volcanic ash
submarine eruption
What volcano has steep sides, is symmetrical and has alternating layers of lava and tephra?
composite cone
What happened with Mount Tambora in 1815 that caused a food shortage?
"the year with no summer" the ash caused the sun to reflect back and cooled the earth.
What is a hot spring that contains more mud than water?
mud pot
What are magma chambers?
pockets of molten rock in the earth's lithosphere
Why does magma rise?
The more matter is heated, the more space it takes and the more pressure builds up to break through the surface.
What is the zone where earthquakes and volcanoes occur often?
Ring of Fire
Name two characteristics of a cinder cone volcano.
resembles a hill, bowl-like crater, may have more than one vent, made of cinders
What is an avalanche of very hot gases and dust?
pyroclastic flow
What is a hot spring that periodically blows steam and hot water into the air?
geyser
Name the 5 eruptions from smallest to greatest.
hawaiian, strombolian, vulcanian, pelean, plinian
How do volcanoes affect weather?
changes in temperature because of debris in atmosphere, acid rain and vog
Why are hot spots different from where most volcanoes happen?
Hot spots are not along plate boundaries.
What 3 ways are volcanoes classified by how often it erupts?
active, dormant, extinct
What happens when part of the mountain collapses and mud and rock fragments surge down the mountain?
debris flow
What is America's most famous geyser and where is it?
Old Faithful in Yellowstone National Park