2.2.2 Practice: The Yellowstone Supervolcano
Earth/Space Science Sem 2
Name:
Practice
Date:
Answer the following questions thoroughly.
1. Draw a diagram of a volcano. Make sure you label the magma chamber,
central vent, side vents, and crater. (5 points)
2. What are the three things that can come out of a volcano during a volcanic
eruption? (9 points)
gas, lava, and fragmented debris called tephra.
3. Volcanoes are able to form in several different plate-tectonic settings.
A. How does a hot-spot supervolcano (such as Yellowstone) form? (5 points)
B. What type of volcano is Mount Saint Helens? (2 points)
C. How is the formation of this type of volcano different than that of a hot-spot
volcano? (6 points)
a. where there is a particularly hot region of the mantle, the layer of the Earth below
the crust Heat from the mantle melts the overlying rocks and the resulting magma
pools close to Earth's surface
may arise from a heated plume originating from the mantle-core boundary
Because of lower pressure in the upper region of the mantle the rock begins to melt.
This forms magma which rises inch by inch until it reaches the surface forming a
volcano
b. stratovolcano
c. Mt. Helens is formed on a subduction plate boundary, while a hotspot is formed
because of mantle plumes
4. Most hot-spot volcanoes erupt through oceanic crust.
A. Do these hot-spot volcanoes tend to erupt more explosively than other
volcanoes? (5 points)
B. What is an example of a hot-spot volcano that supports your answer? (4
points)
a. Yes hotspot volcanoes tend to erupt more
b. Yellowstone hotspots
5. Why do oceanic hot-spot volcanoes often form a long line of volcanic islands?
(10 points)
As the plate moves them away from their source, their magma supply is eventually
cut off and they become extinct, while new volcanoes are formed above the hot spot
6. The Internet is flooded with information on the Yellowstone supervolcano.
What are two characteristics you use to determine if Web sites will have accurate
information? (4 points)
1. knowing who wrote the information and whether he/she provided a contact
address or number.
2. the purpose of writing the information and whether the writer/author is qualified to
write it.
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2.2.2 Practice: The Yellowstone Supervolcano