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Review for midterms

QuestionAnswer
Distinctive fossil used to compare the relative ages of fossils Index fossil
what are the two types of minerals Silicate & Nonsilicate
a mineral must have a definite _________ structure Crystalline
Besides air & water, what can change color of mineral impurities
More than 90% of earth's crust Silicate
Special prop. causing some minerals to glow flourescence
what are two ways minerals break Cleavage & fracture
minerals that don't contain silicon& oxygen Nonsilicate
Tear-shaped bodies that form when magma moves up Pegmatites
the smallest part of an element Atom
copper & gold are ________ native elements
Created by: BenMurray
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