1. 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 __________.
composite volcano.
shield volcano.
cinder volcano.
lava dome
QUESTION 2
1. According to the radiometric time scale reading, which of the following describes radioactive decay?
The number of protons remains the same, but the number of neutrons varies
The number of neutrons remains the same, but the number of protons varies
The mass number of the daughter isotope is one more than the parent and both isotopes have the same atomic number
The daughter isotope has an atomic number two less than the parent and a mass number four less
QUESTION 3
1. Refer to the following relative time scale diagram to answer the question: which period represents the longest subdivision of the geologic time.
Precambrian
Eocene
Carboniferous
Mississippian
QUESTION 4
1. 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
QUESTION 5
1. 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
QUESTION 6
1. Recall your reading of Relative Time Scale and Radiometric Time Scale and match the term with the definition.
– A. B. C. D. E. F. G. H.
Isotopes
– A. B. C. D. E. F. G. H.
Half-life
– A. B. C. D. E. F. G. H.
Carbon 14
– A. B. C. D. E. F. G. H.
Igneous rocks
– A. B. C. D. E. F. G. H.
Hutton
– A. B. C. D. E. F. G. H.
Petrology
– A. B. C. D. E. F. G. H.
Index fossil
– A. B. C. D. E. F. G. H.
Stratigraphy
A.
Rocks that generally do not contain fossils
B.
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
C.
Studies of rock layering
D.
The time it takes for one-half of a particular radioactive isotope in a sample to decay
E.
Atoms of the same element with differing atomic weights
F.
Isotope found in all living plants and animals
G.
Studies on the origins of the various kinds of rocks
H.