Diagnostic Test 1 - D2 Flashcards
A crystal that lacks well-developed crystal faces
or that has rounded or irregular form due to crowding by
adjacent crystals. *
Euhedral
Subhedral
Anhedral
Polyhedral
Anhedral
Brazil Law is a common type of twinning in which mineral? *
plagioclase
orthoclase
pyroxene
quartz
Qtz
In which atomic model do electrons orbit around the nucleus? *
Bohr’s Model
Rutherford’s Model
Thomson’s Model
Dalton’s Model
Bohr
Which of the following DOES NOT belong to the Lanthanide Series? *
cerium
europium
ytterbium
uranium
Uranium
Who classified elements based on their behavior in a
hypothetical iron alloy-silicate-sulfide-gas system? *
Agricola
Goldschmidt
Bowen
Sorby
Goldschmist
This defect occur when an atom is displaced
from the position it normally occupies to an
interstitial site. *
Schottky
Frenkel
Edge dislocation
Screw dislocation
Frenkel
Which of the following is NOT a feldspathoid? *
leucite
nepheline
sanidine
sodalite
Sanidine
Which of the following minerals DOES NOT contain titanium in its chemical formula? *
akermanite
ilmenite
rutile
titanite
Akermanite
Scheelite is a mineral under which class? *
chromates
vanadates
tungstates
phosphates
tungstates
Which of the following minerals is under the scapolite group? *
cordierite
heulandite
tridymite
analcime
heulandite
Which of the following minerals is a nesosilicate? *
tremolite
enstatite
akermanite
forsterite
forsterite
What is the Si:O ratio of phyllosilicates? *
2:5
4:11
1:3
1:2
2;5
What is the luster of sphalerite? *
resinous
vitreous
greasy
adamantine
resinous
Very small amounts of which metal in the crystal structure of ruby gives itsdeep red color?
zinc
iron
titanium
chromium
chromium
The following minerals has a streak color of shades of yellow, EXCEPT:
orpiment
zincite
sulfur
chrysocolla
chrysocolla
It is the ability of minerals to give off visible light when they are struck by energy of a shorter wavelength even after the energy source is turned off. *
fluorescence
phosphorescence
thermoluminescence
triboluminescence
phosphorescence
Which variety of K-feldspar exhibit opalescence? *
amazonite
moonstone
sunstone
spectrolite
moonstone
Which term is used to describe a mineral habit that is needle-like? *
acicular
capillary
filiform
reticulated
acicular
This term describes a mineral of which it is capable of being drawn into a wirelike shape. *
malleable
brittle
sectile
ductile
ductile
Which of the following asbestiform minerals is also known as a blue asbestos? *
chrysotile
crocidolite
amosite
actinolite
crocidolite
The silica content of basic rocks is: *
40-45%
45-52%
52-60%
60-66%
45-52%
This term describes a rock that is generally light in color. *
melanocratic
autocratic
leucocratic
authigenic
leucocratic
Given: A = 20%, B = 40%, C = 10%. After normalization, the value of A becomes: *
28%
29%
30%
31%
29%
A phaneritic rock has the following mode: 13% quartz, 45% plagioclase, 23% orthoclase, 5% biotite, 10% hornblende, and 4% others. This rock is therefore classified as: *
Monzodiorite
Monzonite
Quartz Monzonite
Quartz Monzodiorite
Quartz Monzodiorite