Download Volcano Stations

Monday October 31, 2016
• Please take out:
–Vocab chart (homework)
–Volcano station notes
–ISN
PLATE TECTONICS TEST
CLASSCRAFT
Volcano Stations
REVIEW
QUESTION #1
1. Why are volcanoes
considered a “window” into
the Earth’s interior?
ANSWER
1. Why are volcanoes considered a
“window” into the Earth’s interior?
•
They allow us to study material that
comes from deep within the crust and
possibly from parts of the mantle.
QUESTION #2
2.
What is the difference
between a lava flow and a
pyroclastic flow?
ANSWER
2. What is the difference between a lava
flow and a pyroclastic flow?
• Lava flows are molten rock while
pyroclastic flows are rock fragments, dust,
ash & gases
QUESTION #3
3. (a) Besides water, what
makes magma explosive?
(b) Where do explosive
volcanoes get their high water
content in their magma?
ANSWER
3. (a) Besides water, what makes magma explosive?
High Silica content.
(b) Where do explosive volcanoes get their high
water content in their magma?
Explosive volcanoes
occur along subduction
zones where ocean
water also becomes
subducted with the plate.
QUESTION #4
4.(a) Which pyroclastic
material is about the size of
a quarter?
(b) Provide THREE ways
pyroclastic flows can be deadly:
ANSWER
4. (a) Which pyroclastic material is about the
size of a quarter?
– Lapilla (cinders)
(b) Provide THREE ways pyroclastic flows can
be deadly:
– Speed of the cinders
– Extreme heat
– Poisonous gas
QUESTION #5
5.
What is the difference
between pahoehoe lava and
aa lava?
ANSWER
5. What is the difference between pahoehoe lava and aa
lava?
•Its viscosity – pahoehoe has high viscosity (flows slowly),
while aa has low viscosity (flows quickly)
Pahoehoe lava
aa lava
QUESTION #6
6. Identify the volcanoes pictured below as
either explosive or nonexplosive?
(B) Kilauea
eruption
(A) Aleutian Island Volcano
(C) Eruption along
midocean ridge
(D) Mayon Volcano, Philippines
ANSWER
6. Identify the volcanoes pictured below as
either explosive or nonexplosive?
(B) Kilauea
eruption NONEXPLOSIVE
(A) Aleutian Island Volcano EXPLOSIVE
(C) Eruption along
midocean ridge NONEXPLOSIVE
(D) Mayon Volcano, Philippines EXPLOSIVE
QUESTION #7
7. Identify the pictures below as one of the
THREE types of volcanoes.
(A) Mount Fuji, Japan
(C) Sunset Crater, Arizona
(B) Iceland volcano
ANSWER
7. Identify the pictures below as one of the
THREE types of volcanoes.
(A) Mount Fuji, Japan
– STRATOVOLCANO
(C) Sunset Crater, Arizona –
CINDER CONE
(B) Iceland volcano – SHIELD VOLCANO
QUESTION #8
8. Explain how composite
(strato) volcanoes are made in
layers.
ANSWER
8. Explain how composite (strato) volcanoes are
made in layers.
•
These types of volcanoes alternate between
having lava flows and then producing
pyroclastic material so the sides are built by
layers of these 2 types of material
QUESTION #9
9. How does solid rock in the
asthenosphere become liquid
in a magma chamber of a
volcano?
ANSWER
9. How does solid rock in the asthenosphere become
liquid in a magma chamber of a volcano?
• As rock in the asthenosphere rises from differences in
temperature & density, pressure decreases allowing the
putty like rock to melt and rise into a magma chamber.
QUESTION #10
10. How can a volcano affect
global temperature?
ANSWER
10. How can a volcano affect global temperature?
• The volcanic dust and sulfur gas stay suspended
in the atmosphere for long periods of time
(possibly years) spreading across the globe and
blocking the amount of solar radiation reaching
the Earth.
Redoubt in Alaska
Mount Pinatubo
Draw a profile of the three
different types of volcanoes
• What is the difference between each?