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1.
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(2 points) All the following provide evidence for
continental drift except:
a | age of selected continental rocks. | b | apparent polar wandering. | c | location of coral
reef fossils. | d | evidence of constant ocean salinity. | e | shape of continental
margins. |
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2.
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(2 points) The magnetic north pole has remained very
close to the geographic North Pole through all of geologic time.
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3.
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(2 points) The magnetic field of the Earth is
imprinted upon iron-bearing rocks when they form. Which of the following geologist CANNOT use
to support the theory of plate tectonics?
a | provides a record of magnetic reversals | c | provides a record of original
longitude | b | provides a record of original latitude | d | provides a record of where the magnetic north
pole is/was (polar wander) |
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4.
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(2 points) Which of the following is NOT one of the
peices of evidence Harry Hess used to construct his Sea Floor Spreading hypothesis?
a | Earthquakes at ridges and subduction zones | d | Earth’s magnetic field
reverses, this change recorded by iron minerals in rocks | b | Heat flow highest at
ridges, decreases away from ridges | e | All of these were used by Harry Hess | c | Radiometric dating shows oldest rocks on sea
floor of 200 m.y. |
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5.
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(2 points) Confirmation of seafloor spreading was
supported by the:
a | age of seafloor. | b | apparent polar wandering. | c | magnetic reversals
found in continental rocks. | d | match of rocks from distant
continents. | e | sediment analysis from different areas of the
seafloor. |
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6.
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(2 points) Isostacy is the balancing of pressures
exerted by mass of continents and ocean crust on mantle
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For questions 7 - 10, match the parts of the Earth with the correct
definition. a | Continental crust | c | Mantle | b | Oceanic crust | d | Core |
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7.
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(2 points) A solid, rocky layer that is 82% of
Earth's volume; Upper portion has the composition of the ultramafic rock peridotite
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8.
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(2 points) Has an average rock density about 2.7
g/cm3; Composition comparable to the felsic igneous rock granodiorite
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9.
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(2 points) Larger than the planet Mars;
comprised mostly of iron with some nickel and has an average density is nearly 11
g/cm3
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10.
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(2 points) Has a density about 3.0
g/cm3; Composed mainly of the igneous rock basalt
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