The ropy, basalt-rich, and steam-charged lava flows found in volcanoes like Kilauea are called ____ lava.
a. aa
b. maar
c. lahar
d. pumice
e. pahoehoe
Question 2Rhyolite magma usually erupts in which form?
a. thin, fast lava flows
b. thick, fast lava flows
c. thick, slow lava flows
d. fast ash flows
e. fine ash columns
Question 3Hotspot volcanoes in an oceanic plate ____.
a. create large amounts of serpentine as they react with groundwater
b. tend to form large lava flows from wet basalt
c. are among the most explosive of volcanoes
d. originate from melted rhyolite in the seafloor
e. originate from deep peridotite, which rises as a plume of dry basalt
Question 4A subduction zone provides an environment that affects the types of volcanoes that develop there because ____.
a. the subducting slab is subjected to high pressure
b. the continental slab is composed of denser material than the subducting slab
c. the magma will reach the surface more quickly
d. the subducting crust is high in silicates
e. there is a high water content in the rock of the subducting slab
Question 5The magma that erupts from the divergent boundary of the Mid-Atlantic ridge produces ____.
a. thin basalt lava flows
b. thin rhyolite lava flows
c. andesite volcanoes
d. peridotite shield volcanoes
e. peridotite lava flows
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