The famous destruction of the Roman city of Pompeii was produced by ________
A) a large cinder cone burying the city in tephra
B) a pyroclastic eruption from a composite volcano that buried the city in ash and smothered the people living there
C) a volcanic mudflow from Mt. Vesuvius that buried the people and the city
D) a composite volcano erupted lava that buried the city, fossilizing people who were overridden by the fast moving flows
B
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On average, how quickly do faults slip?
a) millimeters per minute b) millimeters per second c) millimeters per day d) millimeters per year
What was not a factor in making the mapping of the Earth's ocean more difficult?
A) The water covering our planet B) The clouds in the atmosphere C) Technology to measure depths D) The gravitational pull of underwater features
Where is most oxygen located?
A. Mesosphere B. Thermosphere C. Stratosphere D. Troposphere
Why is there little to no growth expected for hydropower?
A. Too much pollution is generated when the dams are in operation. B. The cost of generating power is much too high. C. Almost all rivers that can be dammed for power generation have been dammed already. D. Hydropower uses a nonrenewable resource that is quickly being depleted.