Patterns of Volcanoes
Relationship of volcano formation
Volcanic hazards associated with kinds of lava flows
Effects on environments and people
How to stay safe in presence of an active volcano
100
Give an example from the U.S volcano that is in the "Ring Of Fire" that was famous in 1980.
By Hau and Theo.
Mountain St. Helens
100
Why can't contour lines be connected together?
Contour lines can't be connected together because each line represents their own elevation.
100
What are three types of lava flows?
Lava flows, pyroclastic flows, and lahars.
100
How can ash effect on environment and its people?
Volcano eruption can send ash into the sky in many kilometers. It causes homes, factories, and school to collapse because of too much ash that's on top of the roof. Ash could kill people because the volcano pollutes the area that is near the volcano with ash.
100
Can you escape from pyroclastic flows? Why or Why not?
You probably can't escape from pytoclastic flows because the they flow at about 350km/hr.
200
True or False: Most volcanoes are on land.

True

200
What kind of volcano is low-silica?
Shield volcano is a low-silica because it has gentle slope that can flow freely and gently.
200
Why are lava flows dangerous?
They are dangerous because the lava can destroy everything in its path. Mostly, it flows on a gentle slope(runs slower), so you could escape it before it comes to you.
200
Define and explain VEI.
VEI stands for Volcanic Explostivity Index and it is based on the volume of erupted material from the volcano and the height it reaches.
200
Should you go uphill or downhill of another mountain when a volcano erupts?
You should go uphill because the lava can't go fast and reach the top of another mountain. You

shouldn't

go downhill because the lava will be faster than you and it might kill you when you evacuate to downhill.
300
What are most volcanoes on land caused by?
Most volcanoes on land are caused by the Earth's plates moving toward each other.
300
What is a common type of volcano that has silica-rich?
The most common type of volcano that has silica-rich is a "Composite Cone" which erupts violently.
300
In 1973, how did the citizens of Heimaey make the lava slow down?
The citizens sprayed water to the lava because it made the lava turn to crust and caused it to slow down.
300
How can pyroclastic flows effect people?
They effect people by its steamed down slopes and speeds that can flow about 350km/hr. This killed 10,000 people on Mountain St. Helens.
300
How can you make lava slow down?
You could spray water to the lava to make it slow down.
400
What are the patterns of the volcanoes?
  • The patterns of the volcanoes are on the "Ring Of Fire" because there are several tectonic plates that meet along the Ring Of Fire.
    • 400
    What are the differences of silica-poor and silica-rich magma?
    Silica-poor magma produce with a gentle slope because it flows freely and slowly. Silica-rich is form volcanic domes with steep sides and it erupts violently.
    400
    Why are pyroclastic flows so dangerous?
    Pyroclastic flows are dangerous because it is made up of high-density mixtures of hot ash and rock with hot gases and it flows up to 350km/hr, which peoples' cars can't run that fast so they would die.
    400
    How can lahar flows effect the environment and its people?
    Lahars sometimes form when the erupted material dams the mountain's drainage, causing a lake to form. The lake may spill over the loose volcanic material and send water and debris down the valley.
    400
    How can scientists know if a volcano is about to erupt?
    Scientists use their technology to see if a volcano is about to erupt such as satellite images.
    500
    What kind of map do scientists use to see the historical volcanic activity throughout the world?
    Scientist use USGS map.
    500
    What relationship is there between magma composition and volcanic land forms?
    Magma composition has silica-rich magma, which moves slowly. It's very dangerous when the explosive and violent pressure builds up. Over time, it builds pressure then blows off, and then it repeats!
    500
    How could you stay safe with lahar flows?
    Lahar flow down to the valley. You could go to the highest spot that you could think of and the flows can't reach you at the high elevation.
    500
    Is lava a good thing or a bad thing for the environment and its people?
    Lava is a bad thing for the environment and its people because it flows with a hot temperature and it kills/destroys everything in its path such as plants, animals, people, etc...
    500
    If there is a volcano that is blowing ashes in the air, what would you do protect yourself from the polluted air?
    You can wear a mask that can cover your nose so you don't breath in the polluted air.
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