volcano stations review. question #1 1.how are volcanoes considered both constructive and...
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QUESTION #1QUESTION #1
1. How are volcanoes considered both constructive and destructive forces in geology?
1. How are volcanoes considered both constructive and destructive forces in geology?
ANSWERANSWER
1. How are volcanoes considered both constructive and destructive forces in geology?
• Create crust with lava eruptions and destroy crust with explosive eruptions
1. How are volcanoes considered both constructive and destructive forces in geology?
• Create crust with lava eruptions and destroy crust with explosive eruptions
QUESTION #2QUESTION #2
2. What is the difference between a lava flow and a pyroclastic flow?
2. What is the difference between a lava flow and a pyroclastic flow?
ANSWERANSWER2. 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
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 #3QUESTION #3
3. Where do explosive volcanoes get their high water content in their magma?
3. Where do explosive volcanoes get their high water content in their magma?
ANSWERANSWER3. 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.
3. 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 #4QUESTION #4
4. Which pyroclastic material is about the size of a quarter?
4. Which pyroclastic material is about the size of a quarter?
ANSWERANSWER
4.Which pyroclastic material is about the size of a quarter?
• Lapilla (cinders)
4.Which pyroclastic material is about the size of a quarter?
• Lapilla (cinders)
QUESTION #5QUESTION #5
5. Provide THREE ways pyroclastic flows can be deadly:
5. Provide THREE ways pyroclastic flows can be deadly:
ANSWERANSWER5. Provide THREE ways pyroclastic
flows can be deadly:
• Speed of the cinders• Extreme heat• Poisonous gas
5. Provide THREE ways pyroclastic flows can be deadly:
• Speed of the cinders• Extreme heat• Poisonous gas
QUESTION #6QUESTION #6
6. What is the difference between pahoehoe lava and aa lava?
6. What is the difference between pahoehoe lava and aa lava?
ANSWERANSWER6. 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)
6. 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 lavaaa lava
QUESTION #7QUESTION #77. Identify the volcanoes pictured below as either explosive or nonexplosive?
7. Identify the volcanoes pictured below as either explosive or nonexplosive?
(A) Aleutian Island Volcano (D) Mayon Volcano, Philippines
(B) Kilauea eruption
(C) Eruption along midocean ridge
ANSWERANSWER7. Identify the volcanoes pictured below as either explosive or nonexplosive?
7. Identify the volcanoes pictured below as either explosive or nonexplosive?
(A) Aleutian Island Volcano - EXPLOSIVE
(D) Mayon Volcano, Philippines - EXPLOSIVE
(B) Kilauea eruption - NONEXPLOSIVE
(C) Eruption along midocean ridge - NONEXPLOSIVE
QUESTION #8QUESTION #88. Identify the pictures below as one of the THREE types of volcanoes.
8. Identify the pictures below as one of the THREE types of volcanoes.
(A) Mount Fuji, Japan
(B) Iceland volcano
(C) Sunset Crater, Arizona
ANSWERANSWER8. Identify the pictures below as one of the THREE types of volcanoes.
8. Identify the pictures below as one of the THREE types of volcanoes.
(A) Mount Fuji, Japan – STRATOVOLCANO
(B) Iceland volcano – SHIELD VOLCANO
(C) Sunset Crater, Arizona – CINDER CONE
QUESTION #9QUESTION #9
9. How does solid rock in the asthenosphere become liquid in a magma chamber of a volcano?
9. How does solid rock in the asthenosphere become liquid in a magma chamber of a volcano?
ANSWERANSWER9. 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.
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 #10QUESTION #10
10.How can a volcano affect global temperature?
10.How can a volcano affect global temperature?
ANSWERANSWER10.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.
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
QUESTION #11QUESTION #11
11. Explain how composite (strato) volcanoes are made in layers.
11. Explain how composite (strato) volcanoes are made in layers.
ANSWERANSWER11. 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
11. 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