What are they made of?
How they erupt?
Where are they found?
Mount Saint Helens
100
What are they made of
Magma and ash
100
What causes magma to rise to the surface?
Extreme heat and pressure
100
What year did it erupt?
1980
200
What occurs before a volcano is going to erupt?
Small earthquakes
200
Where do they regularly erupt?
hawaii
200
How many people were killed?
57
300
Why are the holes in volcanoes so big?
The extreme pressure forces it up through a tiny crack then the crack gets bigger until it is a huge hole with magma sprizting out.
300
Where are they found?
Where tectonic plates are converging or diverging
300
How many people were injured
198
400
what are the main types of volcanoes?
Sheild volcano, Cinder volcano, and composite volcano
400
Where can they form?
where there is thinning or stretching of the crust
400
When they began a cleanup operation, how many tons of ash did they collect?
600,000
500
BONUS: What is magma made of
Crystallized minerals and dissolved gasses
500
Bonus: How much did damage to crops cost?
$175 million
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