Earth Science Review 4 (2): Question Preview (ID: 11457)

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Which of the following is not a characteristic that geologists use to identify rocks?
a) texture
b) mineral composition
c) color
d) size

In ___________ rocks grains occur randomly throughout the rock
a) nonbanded
b) banded
c) patterned
d) nonpatterned

Igneous rocks with a _________ silica content form light colored rocks
a) high
b) low
c) medium
d) zero

A fine grained igneous rock probably formed
a) extrusively
b) intrusively
c) coarsely
d) finely

________ rocks with _________ edges make up conglomerate
a) clastic; rounded
b) clastic; jagged
c) chemical; rounded
d) chemical; jagged

_____________ sedimentary rock forms when dissolved minerals crystallize on top of a rock
a) chemical
b) organic
c) clastic
d) crystal

Foliated ____________ rocks have grains arranged _______________
a) metamorphic; in parallel layers
b) metamorphic; randomly
c) sedimentary; in parallel layers
d) sedimentary; randomly

Which rock has a jagged grain shape?
a) conglomerate
b) breccia
c) igneous
d) metamorphic

Sedimentary rocks that contain fossils are called
a) organic
b) chemical
c) clastic
d) crystal

Intrusive igneous rocks
a) formed by cooling rapidly
b) formed by cooling slowly
c) have fine grains
d) 2 of the choices

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