The airborne material ejected from a volcano is termed________
A) lava
B) magma
C) silica
D) granite
E) pyroclastic material
Answer: E
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An atoll typically has all of the following characteristics, EXCEPT
A) soil formed from coral. B) a high central peak. C) a barrier reef D) a lagoon in its center. E) a fringing coral reef.
Which of the following statements describes the overall effect of clouds?
A. They have a net warming effect on climate. B. They have a net cooling effect on climate. C. They are the most important feature in determining climate. D. They have no net effect on climate.
What piece of equipment was able to facilitate the new fields of stratigraphy and paleoceanography
with the data it generated? a. Clamshell samplers b. Deep water cameras c. Piston Corers d. Seismic profilers
Primary air pollutants ____, whereas secondary pollutants _____
A) enter the atmosphere directly; form by chemical actions involving other pollutants B) form through a series of chemical reactions; occur naturally C) occur naturally; are synthetic D) enter the atmosphere directly; enter the atmosphere through human intervention