The difference between a Hawaiian style eruption and a Strombolian style eruption is the composition
of the magma. Indicate whether the statement is true or false.
F
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Nellie and Phil experience weightlessness
A. in a freely-falling elevator. B. momentarily when they step off a high stair. C. in the absence of a supporting surface. D. all of the above
All of the following can result from a strong El Niño event EXCEPT:
A) the suppression of the Southern Oscillation. B) weakening or reversing of the Pacific tradewinds. C) depletion of fish populations as upwelling is suppressed along the western coast of South America. D) abnormally high air pressure over Indonesia.
Oceans cover slightly less than half of the earth's surface
Indicate whether the statement is true or false
What type of magmas have high silica content and tend to cause violent volcanic eruptions?
A. intermediate B. mafic C. felsic D. andesitic E. lava