Question 1 Recall from your reading about the nature of volcanoes to choose the best answer: Magma tends to rise toward Earth's surface principally because __________. of convection in the mantle of magma cooling mounting pressure within the reservoir rocks become more dense when they melt Question 2 Recall from your reading about the nature of volcanoes to choose the best answer: Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface? Scoria Aa Pahoehoe Pumice Question 3 Refer to the following relative time scale diagram to answer the question: which of the following represents the longest subdivision of the geologic time? Mississippian Precambrian Eocene Carboniferous Question 4 Recall from your reading about the nature of volcanoes to choose the best answer: A volcanic eruption is driven by __________ and __________ which forces its way upward and may ultimately break though zones of weaknesses in the Earth's crust. buoyancy; water pressure heat; water pressure heat; gas pressure buoyancy; gas pressure Question 5 Recall from your reading about the relative time scale and refer to the following diagram of a composite geologic section to answer the question. Which of the following is the oldest rock layer observed in the diagram? Bright Angel shale Hermit Shale Tapeats Sandstone Kaibab limestone Question 6 · Recall your reading of Relative Time Scale and Radiometric Time Scale and match the term with the definition. Isotopes Half-life Carbon 14 Igneous rocks Hutton Petrology Index fossil Stratigraphy A. Isotope found in all living plants and animals B. Atoms of the same element with differing atomic weights C. The Scottish geologist who first proposed the fundamental principle used to classify rocks according to their relative ages D. Studies on the origins of the various kinds of rocks E. The time it takes for one-half of a particular radioactive isotope in a sample to decay F. Studies of rock layering G. Forms of life which existed during limited periods of geologic time and thus are used as guides to the age of the rocks in which they are preserved H. Rocks that generally do not contain fossils Question 7 · Recall from your reading of Principal Types of Volcanoes, and match the description to the type of volcano. Large, fairly steep-sided cones composed of alternating layers of lava flows and pyroclastic material. Small basaltic cones built during one, short, eruptive episode; dominated by cinders. Volcanoes of southwestern Alaska and the Aleutian Islands. Big volcanoes of Hawaii Volcano Paricutin in Mexico Forms dikes from lava Lava is produced after the eruption and flows from the bottom Volcanoes with gentle slopes spreading over large areas A. Cinder cones B. Composite/stratovolcanoes C. Shield volcanoes Question 8 · Recall from your reading about the radiometric time scale to put the following isotopes in order of use, from oldest rock to youngest. Ca ...

1. Question 1
Recall from your reading about the nature of volcanoes to
choose the best answer: Magma tends to rise toward Earth's
surface principally because __________.
of convection in the mantle
of magma cooling
mounting pressure within the reservoir
rocks become more dense when they melt
Question 2
Recall from your reading about the nature of volcanoes to
choose the best answer: Which type of basaltic lava flow has a
fairly smooth, unfragmented, ropy surface?
Scoria
Aa
Pahoehoe
Pumice
Question 3
Refer to the following relative time scale diagram to answer the
question: which of the following represents the longest
subdivision of the geologic time?
Mississippian
Precambrian
Eocene
Carboniferous

2. Question 4
Recall from your reading about the nature of volcanoes to
choose the best answer: A volcanic eruption is driven by
__________ and __________ which forces its way upward and
may ultimately break though zones of weaknesses in the Earth's
crust.
buoyancy; water pressure
heat; water pressure
heat; gas pressure
buoyancy; gas pressure
Question 5
Recall from your reading about the relative time scale and refer
to the following diagram of a composite geologic section to
answer the question. Which of the following is the oldest rock
layer observed in the diagram?
Bright Angel shale
Hermit Shale
Tapeats Sandstone
Kaibab limestone
Question 6
· Recall your reading of Relative Time Scale and Radiometric
Time Scale and match the term with the definition.
Isotopes
Half-life
Carbon 14

3. Igneous rocks
Hutton
Petrology
Index fossil
Stratigraphy
A.
Isotope found in all living plants and animals
B.
Atoms of the same element with differing atomic weights
C.
The Scottish geologist who first proposed the fundamental
principle used to classify rocks according to their relative ages
D.
Studies on the origins of the various kinds of rocks
E.
The time it takes for one-half of a particular radioactive isotope
in a sample to decay
F.
Studies of rock layering
G.
Forms of life which existed during limited periods of geologic
time and thus are used as guides to the age of the rocks in which

4. they are preserved
H.
Rocks that generally do not contain fossils
Question 7
· Recall from your reading of Principal Types of Volcanoes, and
match the description to the type of volcano.
Large, fairly steep-sided cones composed of alternating layers
of lava flows and pyroclastic material.
Small basaltic cones built during one, short, eruptive episode;
dominated by cinders.
Volcanoes of southwestern Alaska and the Aleutian Islands.
Big volcanoes of Hawaii
Volcano Paricutin in Mexico
Forms dikes from lava
Lava is produced after the eruption and flows from the bottom
Volcanoes with gentle slopes spreading over large areas
A.
Cinder cones
B.
Composite/stratovolcanoes
C.
Shield volcanoes
Question 8

5. · Recall from your reading about the radiometric time scale to
put the following isotopes in order of use, from oldest rock to
youngest.
Carbon-14
Potassium-40
Samarium-147
Thorium-232
Uranium-235
Uranium-238
Rubidium-87
Question 9
According to the figure below, give an approximate age for the
Dakota Sandstone and for the Wasatch Formation. Explain what
evidence you used to determine this.
Question 10
Recall from your reading about the nature of volcanoes, and in
your own words, compare and contrast aa and pahoehoe lava in
appearance and how they form.
Question 11
In your own words, briefly explain how a caldera forms from
principle types of volcanos.
Question 12
Volcanoes are generally not preserved in the geologic rock
record because they are usually eroded away. However, the
various materials erupted from volcanoes are often found
preserved in the rock record. From what you have learned about

6. the different principle types of volcanoes, how could you infer
what type of volcano erupted in a given area based on the type
of volcanic deposits now found as layers of rock? Give specific
examples, and briefly discuss how some materials may be linked
to different types of volcanoes.
Your response should be at least 200 words in length.
Question 13
The 2011 earthquake and tsunami in Japan have raised new
concerns about the safety of nuclear energy. While countries
like the US have started new nuclear power plant construction
(in Georgia), and India plans to build the world’s largest
nuclear facility near the west coast port of Jaitapur, Germany
recently announced that it will close its nuclear power plants by
2022 (as now has Japan). If the US does re-start its nuclear
energy program full-force (beyond the upcoming plants in
Georgia), what can the US nuclear industry learn from recent
events in Japan? If you were a consulting geologist hired to join
a team charged with assessing the feasibility of new nuclear
plant construction, what geological factors would you consider
in siting a plant? Are there any geologically safe places to build
a nuclear plant?
Your response should be at least 200 words in length.