LAST-MINUTE REVISION

Question 1

sheet silicates

Answer 1

biotite, muscovite

Question 2

framework silicates

Answer 2

quartz, feldspar

Question 3

rock types

Answer 3

igneous, sedimentary, metamorphic

Question 4

reasons solid rock melts in the transition zone

Answer 4

decrease in pressure, increase in temperature, introduction of volatiles

Question 5

what are the four magma categories and what are their respective percentages of silica

Answer 5

felsic (67-76%), intermediate (53-66%), mafic (46-52%), ultramafic (38-45%)

Question 6

Aphanitic (fine-grained) (AF to remember)

Answer 6

cools fast, extrusive/above ground, volcanic

Question 7

Phaneritic (coarse-grained) (PC to remember)

Answer 7

cools slowly, intrusive, plutonic

Question 8

rhyolite and granite are ________. Rhyolite is ______, granite is ______

Answer 8

felsic, aphanitic, phaneritic

Question 9

Basalt, Gabbro are _______. Basalt is ________, gabbro is ______.

Answer 9

mafic, aphanitic, phaneritic

Question 10

Shield volcanoes are big because they have ____ lava that flows _________

Answer 10

mafic, long distances

Question 11

Effusive, Phreatic, Plinian

Answer 11

low-viscosity, around water, huge explosion