Composite cones ____
a. are part tephra, part caldera
b. may erupt in a pyroclastic flow
c. are composed entirely of tephra
d. are composed entirely of basalt
b
You might also like to view...
Besides geographic fit of continents, what other evidence did Alfred Wegener study to support his theory of continental drift?
A) ?Coal and fossilized remains of tropical plants are absent in frigid Antarctica. B) ?Differences in fossils are found across separated continents. C) ?Ice core samples indicate similar CO2 measurements at both poles. D) ?The alignment of mountain ranges has a similar age, composition, and structure on both sides of the Atlantic.
Fossil and geological evidence indicates that there have been _____ mass extinctions during the past 500 million years.
A. 2 B. 5 C. 8 D. 12 E. 20
Which of the following increased humans' abilities to harvest the great whales?
A. the explosive harpoon and motorized hunting vessels and factory ships B. the explosive harpoon C. sonar D. motorized hunting vessels and factory ships E. All of these are correct.
Which of the following is produced by the acid-catalyzed hydrolysis of methyl propanoate?
A) methanol and propanoic acid B) methanol and a propanoate salt C) propanol and formic acid D) propanol and an formate salt