MSCI 112 LAB FINAL QUESTIONS VERIFIED
ANSWERS
When an oceanic plate floats on the mantle, it will displace ______ of mantles equal to
the _______ of the plate. - Answers - a mass
mass
For continental and oceanic plates, Isostasy refers to __________? - Answers - a state
of equilibrium
The dominant rock type of continental crust us _______, and it is __________ than the
underlying mantle. - Answers - Granite
less dense
The dominant rock type of oceanic crust is ________, and it is ________ than
continental crust. - Answers - basalt
more dense
Oceanic crust is more dense than the under lying mantle. True or false? - Answers -
False
The average elevation of continental crust is so much higher than the average elevation
of oceanic crust because the continental crust is more dense than the underlying
mantle. True or false? - Answers - False
What is the nature of the asthenosphere? - Answers - ductile, plastic, like stretching silly
putty
Why is the oceanic crust younger than continental crust? - Answers - b/c it is always
being recycled through subduction processes
Continental crust is thicker than oceanic crust. True or false? - Answers - True
In the isostasy lab experiments, where 2 blocks of wood were floated in a tank filled w/
water, and you then calculated the masses of column1, column2, and column3. As per
ARCHIMEDES PRINCIPLE, what is the equation? - Answers - mass W1= mass W3 +
mass B3
Go over how to find the density of an object. To start, what is the equation for density? -
Answers - d= m/v
These 2 elements are the building blocks for the most abundant class of materials on
the Earth's crust. - Answers - Si + O
, What is the most abundant class of minerals of the Earth's crust? - Answers - silicates
what is does not fit the definition of a mineral? - Answers - organic
Mineraloids satisfy the criteria to be classified as a mineral. True or false? - Answers -
False
One way that minerals can form is from alteration due to temperature/pressure
changes. List 2 additional ways that minerals can form (1 of the 5 ways in class lecture)
- Answers - -precipitation from water
-crystallization of lava and hot solutions
One physical property of mineral hardness (Moh's hardness scale). I fi take an unknown
minerals and am able to scratch a glass plate (glass plate has a hardness of 5.5), what
does this tell me about the hardness of the unknown mineral? - Answers - the mineral
has a hardness greater then 5.5
A mineral w/ a metallic luster has a dull, earthy appearance. True or false? - Answers -
False
A metallic mineral luster is different than a glassy mineral luster. True or false? -
Answers - True
what describes mineral cleavage the best? - Answers - breakage along preferential
planes of weakness within the mineral
Conchoidal fracture is a characteristic of which mineral? - Answers - Quartz
which mineral displays a reaction (effervescence) w/ Hydrochloric acid? - Answers -
calcite
which mineral will taste salty if you licked it? - Answers - halite
Does kaolinite exhibit cleavage or fracture? - Answers - fracture
Does Gallena have a metallic luster? - Answers - yes
Does orthoclase feldspar exhibit cleavage or fracture? - Answers - cleavage
what mineral does not react with acid? - Answers - halite
What kind of luster does quartz have? - Answers - glassy
What are the dominant minerals that make up continental crust? - Answers - quartz and
orthoclase feldspar
ANSWERS
When an oceanic plate floats on the mantle, it will displace ______ of mantles equal to
the _______ of the plate. - Answers - a mass
mass
For continental and oceanic plates, Isostasy refers to __________? - Answers - a state
of equilibrium
The dominant rock type of continental crust us _______, and it is __________ than the
underlying mantle. - Answers - Granite
less dense
The dominant rock type of oceanic crust is ________, and it is ________ than
continental crust. - Answers - basalt
more dense
Oceanic crust is more dense than the under lying mantle. True or false? - Answers -
False
The average elevation of continental crust is so much higher than the average elevation
of oceanic crust because the continental crust is more dense than the underlying
mantle. True or false? - Answers - False
What is the nature of the asthenosphere? - Answers - ductile, plastic, like stretching silly
putty
Why is the oceanic crust younger than continental crust? - Answers - b/c it is always
being recycled through subduction processes
Continental crust is thicker than oceanic crust. True or false? - Answers - True
In the isostasy lab experiments, where 2 blocks of wood were floated in a tank filled w/
water, and you then calculated the masses of column1, column2, and column3. As per
ARCHIMEDES PRINCIPLE, what is the equation? - Answers - mass W1= mass W3 +
mass B3
Go over how to find the density of an object. To start, what is the equation for density? -
Answers - d= m/v
These 2 elements are the building blocks for the most abundant class of materials on
the Earth's crust. - Answers - Si + O
, What is the most abundant class of minerals of the Earth's crust? - Answers - silicates
what is does not fit the definition of a mineral? - Answers - organic
Mineraloids satisfy the criteria to be classified as a mineral. True or false? - Answers -
False
One way that minerals can form is from alteration due to temperature/pressure
changes. List 2 additional ways that minerals can form (1 of the 5 ways in class lecture)
- Answers - -precipitation from water
-crystallization of lava and hot solutions
One physical property of mineral hardness (Moh's hardness scale). I fi take an unknown
minerals and am able to scratch a glass plate (glass plate has a hardness of 5.5), what
does this tell me about the hardness of the unknown mineral? - Answers - the mineral
has a hardness greater then 5.5
A mineral w/ a metallic luster has a dull, earthy appearance. True or false? - Answers -
False
A metallic mineral luster is different than a glassy mineral luster. True or false? -
Answers - True
what describes mineral cleavage the best? - Answers - breakage along preferential
planes of weakness within the mineral
Conchoidal fracture is a characteristic of which mineral? - Answers - Quartz
which mineral displays a reaction (effervescence) w/ Hydrochloric acid? - Answers -
calcite
which mineral will taste salty if you licked it? - Answers - halite
Does kaolinite exhibit cleavage or fracture? - Answers - fracture
Does Gallena have a metallic luster? - Answers - yes
Does orthoclase feldspar exhibit cleavage or fracture? - Answers - cleavage
what mineral does not react with acid? - Answers - halite
What kind of luster does quartz have? - Answers - glassy
What are the dominant minerals that make up continental crust? - Answers - quartz and
orthoclase feldspar
