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Take Test: Unit IV Assessment
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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 magma cooling
mounting pressure within the reservoir
rocks become more dense when they melt
of convection in the mantle
2 points Saved
QUESTION 2
Recall from your reading about the principle types of volcanoes to choose the best answer: Crater Lake, a caldera, formed from the collapse of a __.
2 points Save Answer
Question Completion Status:
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http://online.waldorf.edu/csu_content/waldorf_content/zulu/common_files/instructions/submissions/submissioninstructions.pdf
http://online.waldorf.edu/csu_content/waldorf_content/zulu/common_files/instructions/submissions/assessmentrubric.pdf
p composite volcano.
shield volcano.
cinder volcano.
lava dome
QUESTION 3
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.
heat; water pressure
heat; gas pressure
buoyancy; gas pressure
buoyancy; water pressure
2 points Save Answer
QUESTION 4
Mt. Rainier in Washington State is an excellent example of what principle type of volcano?
An eroded shield volcano
A caldera
A stratovolcano
Flood basalts
2 points Save Answer
QUESTION 5
Due to the nature of volcanoes the violent separation of gas from lava forms __.
dikes
craters
cinders
pumice
2 points Save Answer
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A.
QUESTION 6
Recall your reading of Relative Time Scale and Radiometric Time Scale and match the term with the de�nition.
Isotopes
Half-life
Forms of life which existed during limited periods of geologic time and thus are used
8 points Save Answer
Question Completion Status:
Click Save and Submit to save and submit. Click Save All Answers to save all answers.
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B.
C.
D.
E.
F.
G.
H.
Carbon 14
Igneous rocks
Hutton
Petrology
Index fossil
Stratigraphy
as guides to the age of the rocks in which they are preserved
Atoms of the same element with di�ering atomic weights
Isotope found in all living plants and animals
The time it takes for one-half of a particular radioactive isotope in a sample to decay
Rocks that generally do not contain fossils
The Scottish geologist who �rst proposed the fundamental principle used to classify rocks according to their relative ages
Studies of rock layering
Studies on the origins of the various kinds of rocks
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