1. Monday October 31, 2016 Please take out: Vocab chart (homework)
Volcano station notes
ISN

2. Plate Tectonics Test

3. Classcraft

4. Volcano Stations
REVIEW

5. QUESTION #1
Why are volcanoes considered a “window” into the Earth’s interior?

6. ANSWER
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.

7. QUESTION #2
2. What is the difference between a lava flow and a pyroclastic flow?

8. ANSWER
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

9. QUESTION #3
(a) Besides water, what makes magma explosive?
(b) Where do explosive volcanoes get their high water content in their magma?

10. ANSWER (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.

11. QUESTION #4
(a) Which pyroclastic material is about the size of a quarter?
(b) Provide THREE ways pyroclastic flows can be deadly:

12. ANSWER (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

13. QUESTION #5
5. What is the difference between pahoehoe lava and aa lava?

14. 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

15. QUESTION #6
6. Identify the volcanoes pictured below as either explosive or nonexplosive?
(B) Kilauea eruption
(A) Aleutian Island Volcano
(D) Mayon Volcano, Philippines
(C) Eruption along midocean ridge

16. ANSWER
6. Identify the volcanoes pictured below as either explosive or nonexplosive?
(B) Kilauea eruption - NONEXPLOSIVE
(D) Mayon Volcano, Philippines - EXPLOSIVE
(A) Aleutian Island Volcano - EXPLOSIVE
(C) Eruption along midocean ridge - NONEXPLOSIVE

17. 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

18. 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

19. QUESTION #8
8. Explain how composite (strato) volcanoes are made in layers.

20. 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

21. QUESTION #9
9. How does solid rock in the asthenosphere become liquid in a magma chamber of a volcano?

22. 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.

23. QUESTION #10
10. How can a volcano affect global temperature?

24. 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

25. Draw a profile of the three different types of volcanoes
What is the difference between each?