The most abundant silica volcanic rock is __
Fill in the blank(s) with the appropriate word(s)
rhyolite
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A depression much larger than the original crater, formed when the volcano collapses into an empty magma chamber is called:
a) vent b) caldera c) basin d) schism e) rift
Which of these statements regarding biogeography is false?
A) Despite their similarities, new world tropical forests and old world tropical forests are occupied by different sets of living organisms. B) Closely related species tend to be found close together, suggesting they evolved in one place and then spread. C) Island species are usually most closely related to species found on the closest mainland. D) Islands tend to be occupied by many land animals, but few or no flying ones.
Stoping is the process in which ____
A)pyroclastic flows are tranformed into obsidian B)rising magma detaches and engulfs pieces of country rock C)the viscosity of magma changes due to changes in silica content D)dikes are formed due to intense heat in the country rock E)erosion exposes batholiths
As a cloud grows larger and taller, ____ sunlight is reflected from it and ____ light can penetrate all the way through it
A) more; more B) less; more C) more; less D) less; less