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Minerals and Rocks
sedimentary igneous minerals
49
Geology
Undergraduate 1
09/13/2009

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Cards

Term
What is geology?
Definition
the study of earth
Term
scientific method
Definition
make observations,
ask questions,
form a hypothesis,
make predictions,
test predictions
analyze and interpret result
present/publish results
Term
scientific theory
Definition
if hypothesis survives repeated testing over time it may be incorporated into a theory
Term
mineral
Definition
solid,
naturally occurring,
inorganic,
ordered internal structure,
definite chemical composition
Term
why study geology?
Definition
to better understand the earths past and future
Term
method of multiple working hypothesis
Definition
proposing and testing multiple, sometimes competing, hypotheses
Term
Are controlled experiments possible?
Definition
not often because there are too many variables, time, and ethics
Term
Is gold a mineral?
Definition
yes because it fits all criteria
Term
Is coal a mineral?
Definition
No its organic
Term
Is glass a mineral?
Definition
No
Term
Is Ice a mineral?
Definition
Yes
Term
How many minerals have been discovered?
Definition
4000 but only 12 are abundant
Term
Composition of earths crust
Definition
Outer core- Iron, some nitrogen, liquid;
Inner Core - Solid mostly Iron;
Mantle - Iron And Magnesium, Silicon and Oxygen;
Crust - Oxygen Silicon Aluminum Iron
Term
Earthquakes
Definition
energy waves that travel through earth
Term
What mineral makes up 90% of earths rocks?
Definition
Silicate
Term
Silicone is made up of what structure?
Definition
Tetrahedron triangle
Term
independent tetrahedron
Definition
not bound to conductor - example olivine - used for gem stones bricks molds casts
Term
Single Chain Silicates
Definition
Tetrahedron bond together sharing an oxygen. They share 2 out of every 4 oxygen. example - augite
Term
Double Chain Silicates
Definition
two sets of single chains share an oxygen. Amphibole or hornblende asbestos (several minerals)
Term
sheet silicates
Definition
also known as phyllosilicates. leaf like, break apart in sheets. the bond per sheet is strong but the bond holding them together is weak. mica (biotite and Muscovite)- used for heat insulation, drywall, and sheet wall. Kaolanite and talc - used for ceramics porcelain toothpaste paper paints and talc is used for face powder
Term
framework silicates
Definition
feldspar - porcelain ceramics and glass,
plagioclase - white
potassium - green pink and white
quartz - only made of silicate tetrahedra - glass paints precision instruments
Term
Silicon oxygen ratio
Definition
one silicon to one oxygen - 25% for isolated terahedra
only 1/4 is silica poor
one silica and 3 oxygen - 33% single chain is average
one silicon to two oxygen - 50%
this is quartz. Silicon rich
Term
the purest quartz in the world was made where?
Definition
spruce pine - 10k a ton! used for semi-conductor manufacturing
Term
non-silicates
Definition
carbonate,
evaporates,
oxides,
sulfides,
native elements
Term
carbonates
Definition
calcite - reacts greatly to acid,
dolomite - reacts slightly to acid,
- uses are cements and antacids
Term
evaporites
Definition
halite - table salt,
gypsum - drywall
Term
oxides
Definition
magnitite
hemitite
geothite
Term
sulfides
Definition
pyrite - "fools gold",
galena,
copper sulfide
Term
native elements
Definition
diamonds,
copper,
gold,
silver
Term
What is a rock?
Definition
solid,
naturally occurring,
cohesive aggregate of minerals
Term
Is gypsum a rock?
Definition
yes
Term
Is coal a rock?
Definition
yes
Term
Is beach sand a rock?
Definition
No, not cohesive.
Term
What are the 3 major classes of rocks?
Definition
igneous,
sedimentary,
metamorphic
Term
What are the 3 major classes of rocks?
Definition
igneous,
sedimentary,
metamorphic
Term
What is an igneous rock?
Definition
cooling of magma
Term
What is a sedimentary rock?
Definition
Lithification of sediments.
Term
What is a metamorphic rock?
Definition
Recrystallization under pressure and/or heat.
Term
What is a metamorphic rock?
Definition
Recrystallization under pressure and/or heat.
Term
What is the black sand in Hawaii made up of?
Definition
igneous rock sandstone
Term
What causes melting?
Definition
1. change in pressure,
2. change in composition or water content,
3. heat generation
Term
What is the black sand in Hawaii made up of?
Definition
igneous rock sandstone
Term
How does magma cool?
Definition
1. magma reaches surface and cools,
2. magma cools beneath the surface
Term
What does crystal size depend on?
Definition
rate of cooling
Term
What is phaneritic?
Definition
"visible" crystal, large crystals
Term
What is aphanitic?
Definition
small crystal size
Term
What are 2 types of igneous textures?
Definition
phaneritic,
aphanitic
Term
What minerals have higher crystallization and higher melting points?
Definition
darker minerals
Term
What minerals have lower crystallization and lower melting points?
Definition
lighter minerals
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