What was the most damaging type of eruption that occurred at Vesuvius in Italy?
A) A huge landslide caused a lateral blast that knocked down trees and buildings.
B) A fast-moving viscous lava flow flowed through the middle of Pompeii.
C) The volcano was so heavy that it caused part of the island to collapse.
D) One or more pyroclastic flows hit the city of Pompeii.
E) None of these are correct.
D) One or more pyroclastic flows hit the city of Pompeii.
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Which of the following factors explains why sunshine in cities is typically less intense than it is in surrounding rural areas?
A. higher pollution levels in cities B. air temperature in cities C. horizon blocked by tall structures in cities D. incident sunshine absorbed by cement and asphalt in cities
What is required to study very small plankton?
A) Plankton net B) Specialized light intensity C) Filtration D) Cyanobacteria
What are the two primary sources for the elements that comprise the dissolved components in seawater?
What will be an ideal response?
Which of the following is the conjugate base of H2PO4-?
A) H3PO4 B) HPO42- C) PO43- D) OH-