Which seismic wave would arrive first at a seismometer?
a. S wave
b. P wave
Answer: b. P wave
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What was the process responsible for the creation of many of Michigan’s waterfalls in the Upper Peninsula?
A. Major differences in elevation between Lake Superior and Lake Michigan B. Weathering and erosion of less resistant Munising sandstone below layers of stronger resistant sandy dolostone C. Weathering and erosion of igneous basalt rock below layers of Hematite D. Evaporation of seawater resulting in rock salt formations
Global positioning systems (GPS) can "know" their location by
A) measuring the time required for radio signals from four or more satellites to reach the receiver. B) relating changes in detected radiation to changes in the position of the Sun. C) continually measuring changes in angle to a stationary reference point, such as a streetlight, in the area of the receiver. D) relating slight changes in magnetism and gravity to changes in the distance and direction of movement from the point at which the location of the receiver was last calibrated.
Most oceanic plateaus are
A) small pieces rifted apart from continents. B) places where the seafloor has been buckled upward by convergence. C) constructed by volcanic eruptions probably over mantle plumes. D) large fan-shaped mounds deposited by turbidity currents.
When did the continents acquire outlines similar to the ones they have now?
A) Cenozoic Era B) Paleozoic Era C) Mesozoic Era D) Devonian Period