Download Reading Guide: Chapter 7: VOLCANOES

Name: _______________________________ Per: ______________ Teacher: __________________
Reading Guide: Chapter 7: VOLCANOES
Section 7.1: Volcanoes and Plate Tectonics: Read and Study pages 116-119
1. Why is most of the rock in the asthenosphere solid?
2. Define Magma:
In what layer of the earth does
Under what conditions does
most magma form?
magma form?
3. Define Volcanism:
Why does magma move upward
through the earth?
What is the difference between
magma and lava?
4a. Define Lava
4b. Define Volcanic Vent:
4c. Define Volcano:
MAJOR VOLCANIC ZONES
5. Where are most active volcanoes found?
6. Describe how volcanoes form at subduction
zones.
Ocean-Continent Convergence:
Diagram of Ocean-Continent Convergence (fig 7-2):
Where do the volcanoes form?
(on the continent edge / in the ocean)
Ocean-Ocean Convergence:
Diagram of Ocean-Ocean Convergence (fig 7-2):
Where do the volcanoes form?
(on the continent edge / in the ocean)
7. Describe volcanism associated with Mid-Ocean
Ridges:
2 Examples:
_________________,_______________
Diagram (fig. 4-7) (Use page 74):
Example:
Diagram (fig 7-3):
8. Describe volcanism associated with hotspots:
Most hotspots are located (at the edges / in the
middle) of lithospheric plates.
Example:
1
Name: _______________________________ Per: ______________ Teacher: __________________
Section 7.2: Volcanic Eruptions: Read and Study pages 120-125
Types of Lava (complete the table below)
Type of crust
(Ocean/Continental)
Color
(Dark/Light)
Silica
(Low/High)
Magnesium/Iron
(Low/High)
Thick or
Thin
Temperature
(Cool/Hot)
Trapped Gases
(Few/Many)
Eruptive Force
(Quiet/Explosive)
Volcanic Materials
(Lava/Tephra)
MAFIC
FELSIC
Volcanic Materials:
1. Describe the following lava types:
a. Pahoehoe:
2. Tephra = Pyroclastic
material
Define pyroclastic
material:
3. List and briefly describe the types of pyroclastic material:
a.________________________:
b. ________________________:
b. Aa:
c. ________________________:
d. ________________________:
c. Pillow lava:
e. ________________________:
Volcanic Cones: List and Describe the 3 types.
5.
4.
6.
Example:
Example (BONUS):
Example:
Diagram the volcanic cone describe above. (See Fig 7-6)
Diagram the volcanic cone describe above. (See Fig 7-6)
Diagram the volcanic cone describe above. (See Fig 7-6)
7. Define Crater:
8. Define Caldera:
9. List and briefly explain the Warning Signals for a volcanic eruption.
a.
c.
b.
d.
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