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GEL1010 Ch 3,4,7,8 Minerals Rocks

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

________ is not a mineral.
a.
Gold
c.
Calcite
b.
Halite
d.
Oxygen
 

 2. 

What element is the most abundant in the Earth's crust by weight?
a.
carbon
c.
oxygen
b.
sodium
d.
chlorine
 

 3. 

Why does garnet have less silicon than quartz?
a.
Garnet has a three-dimensional structure.
b.
As more oxygen atoms are shared in a silicate polymer, the percentage of silicon increases.
c.
As more silicon atoms are shared in a silicate polymer, the percentage of silicon increases.
d.
A and C
 

 4. 

Which of the following best characterizes ferromagnesian silicates?
a.
They are black to dark-green silicate minerals containing iron and magnesium.
b.
They contain magnetite and ferroite, and they are clear to light green.
c.
They are mostly clear, colorless, and rich in the elements magnesium and ferrium.
d.
They contain iron and magnetite, are black in color, and they have metallic lusters.
 

 5. 

All of the following are factors that affect the generation of magma EXCEPT for ________.
a.
crystal size
c.
volatiles
b.
pressure
d.
heat
 

 6. 

The last minerals to crystallize on Bowen's Reaction Series result in igneous rocks with a ________ composition.
a.
felsic
c.
intermediate
b.
mafic
d.
ultramafic
 

 7. 

Detrital grains of which mineral(s) are extremely rare in detrital sediments? Why?
a.
Feldspars; they occur only in granites.
c.
Calcite; it is soft and relatively soluble.
b.
Quartz; it is very hard and insoluble.
d.
Clays; they are rare in soils and regolith.
 

 8. 

A cherty limestone would contain which major constituents?
a.
iron oxide, calcite
c.
silica, calcite
b.
clay minerals
d.
silica, iron oxide
 

 9. 

Oolitic limestone is most likely to form in what type of depositional environment?
a.
deep, marine waters below most wave action
b.
acidic, organic-rich waters in freshwater swamps and bogs
c.
shallow, clear, marine waters with vigorous current activity
d.
quiet, muddy, lagoons and bays
 

 10. 

What platy, parallel, mineral grains are the most visual aspect of foliated metamorphic rocks?
a.
quartz
c.
carbonates
b.
micas
d.
feldspars
 

One Word Completion / One Word Answer
Complete or answer each statement by typing only one word. Answer numbers as text..
 

 11. 

What physical property denotes the color of a powdered mineral?
 

 

 12. 

What is the hardest mineral known?
 

 

 13. 

Technically, the process whereby ions arrange themselves into orderly patterns during the cooling of a liquid is called ________.
 

 

 14. 

What is the most abundant mineral in detrital sedimentary rocks?
 

 

 15. 

Which metamorphic rock or rocks exhibit alternating layers or bands of different light- and dark-colored minerals?
 

 



 
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