VOLCANOES STUDY GUIDE AND CHECKLIST
NAME ______________________
Here is what you need to do to prepare for the test:
1) Glance over the Chapter 1 Outline and Objectives (# 15 in your binder) to wrap your head
around everything we did on volcanoes.
2) Study all the old quizzes (# 18, 21, 27, 31, 33, 39, 43). They contain the most important
information from each activity!
3) Fill out the matching for the geo-words below:
4) On a separate piece of paper, answer the questions below regarding the Main Concepts:
1) _______Mid-ocean ridge
2) _______Ring of Fire
3) _______Rift valley
4) _______Magma
5) _______Lava
6) _______Hot spot
7) _______Mercator projection
8) _______Contour lines
9) _______Contour interval
10) _______Topographic map
11) _______Shield volcano
12) _______Composite cone
13) _______Caldera
14) _______lava flow
15) _______Pyroclastic flow
16) _______Lahar
17) _______Viscosity
18) _______tephra
19) _______Volcanic bomb
20) _______Lapilli
21) _______Ash
22) _______Intrusive igneous rock
23) _______Extrusive igneous rock
24) _______Sedimentary rock
25) _______Metamorphic rock
26) _______Tuff
27) _______Rhyolite
28 _______ Basalt
29) _______Pumice
30) _______Obsidian
31) _______Seismology
32) _______Tiltmeter
33) _______GPS
34) _______seismometers
A. rock formed from compressed layers on the surface
B. volcanic hazard: hot ash, rock fragments, and hot gases
C. all volcanic material emitted into the air
D. rock formed from magma cooling slowly inside earth
E. low-silica volcano with gentle slopes
F. a map showing the slope, elevation, and relief of the land
G. volcanic hazard: mixture of water, ash, mud, rock bits
H. lines of equal elevation on a topo map
I. mountain range under the Atlantic ocean
J. largest tephra particle
K. rock formed from hardened pyroclastic flows
L. most common rock on earth: low-silica volcanic
M. study of earthquakes
N. massive crater formed when a volcano blows its top
O. high-silica light-colored volcanic rock
P. underground instrument that measures change in slope
Q. shiny glass-like volcanic rock that cooled very fast
R. smallest airborn tephra particle
S. very light volcanic rock with lots of vesicles
T. global positioning system
U. rock that formed deep inside earth from high pressure
V. circular region in Pacific ocean that has many volcanoes
W. medium-sized tephra particle
X. high-silica volcano with steep slopes
Y. region on land where tectonic plates are moving apart
Z. molten rock inside the earth
a. cylindrical map projection of the earth onto a flat surface
b. instruments with which to measure earthquakes
c. rock formed by magma cooling quickly on the surface
d. a measure of stickiness, or resistance to flow
e. flow of molten rock down the slopes of a volcano
f. a “puncture wound” in the earth’s crust
g. change in elevation between contour lines
h. molten rock on the surface of the earth
MAIN CONCEPTS: ANSWER ON A SEPARATE SHEET OF PAPER
1) Activity 1(# 16 in binder): Where on earth do volcanoes occur?
2) Activity 1(# 161 in binder): What is the main cause of most volcanoes found on LAND?
3) Activity 1(# 16 in binder): What happens to Earth’s surface on a Mercator map projection?
4) Activity 2 (# 19): How does silica content affect viscosity and the shape of a volcano?
5) Activity 2 (# 19): Why are volcanoes in Hawaii different from those in the Cascades?
6) Activity 2 reading guide (# 20): How does silica content affect the amount of dissolved gases?
7) Activity 2 (# 19): How can you tell that a certain region on a topo map is steeper than another?
8) Activity 2 (# 19): What are some of the most common topo map rules?
9) Activity 3 (# 23): What are the three types of volcanic flows and how do they differ?
10) Activity 3 part B (# 24): How do you measure the speed of something?
11) Activity 4 (# 28): What are the three types of tephra and how are they different?
12) Activity 4 (# 28): Can our community be affected by a distant volcano? How?
13) Activity 4 (# 28): What three factors affect how far ash travels?
14) Activity 4 concept map (# 30): What are some of the hazards of volcanic ash?
15) Activity 5 (# 32): What are the 3 main gases emitted by volcanoes?
16) Activity 5 (# 32): Explain how volcanoes affect each of the 5 spheres on the earth.
17) Activity 5 (# 32): How does silica content impact a volcano’s explosivity?
18) Activity 5 (# 32): Why does carbon dioxide pose a threat?
19) Activity 6 (# 34): How can you visually discriminate between intrusive and extrusive igneous
rocks?
20) Activity 6 (# 34): What is the volcanic history of CO? None? Some? Where?
21) Activity 7 (# 40): What are some of the signs that a volcano might erupt? What instruments
would you use to measure the threat?
22) Complete the following table relating silica to the other characteristics of volcanoes.
Silica Content Type of Volcano produced Viscosity of lava Explosiveness of volcano
HIGH
LOW