GEOG 1113L LAB 7 COMPREHENSIVE EXAM
STUDY GUIDE WITH COMPLETE
SOLUTIONS
●● Lab 1: standard deviation
Answer: a computed measure of how much scores vary around the mean
score
●● Lab 1: oceanic vs continental crust
Answer: mantle is the densist; oceanic crust is thin and dense under the
ocean; continental crust is thick and least dense (oceanic crust subducts
under because it's the most dense)
●● Lab 1: isostacy
Answer: how high the crust floats on the mantle
●● Lab 1: how does isostasy apply to the crust/mantle system?
Answer: the most dense crust subducts and the least dense 'floats'
maintaining equilibruim
●● Lab 1: peridotite
Answer: mantle and densest
,●● Lab 1: basalt
Answer: oceanic and medium density
●● Lab 1: andesite
Answer: continental and least dense
●● Lab 1: oceanic crust
Answer: dense, thinner, likely to undergo subduction, younger crust
●● Lab 1: continental crust
Answer: less dense, thicker, less likely to undergo subduction, older
●● Lab 1: Question 3.4:
make a scale sketch of a cross-section of continental crust in contact
with oceanic crust and ocean water overlying the oceanic crust. pay
attention to the relative thickness and heights of the two types of crust as
well as the depth of the water. the average depth of the ocean floor is
12,100 ft
Answer: Draw a cross-section (like this picture, make sure to include the
12,000 ft mark and arrows pointing where the crust goes.
●● Lab 1: 3.5:
Lets tie what we've learned in parts 1 and 3 together. match the
following options to either oceanic crust or continental crust:
,a) composed of denser rocks/composed of less dense rocks
b) thicker/thinner
c) More/less likely to undergo subduction
Answer: Oceanic Crust: Denser rocks, thinner, more
Continental Crust: Less Dense rocks, thicker, less
●● Lab 1: 3.6:
Relating to 3.5, which rocks do you think are older on average? those in
continental or oceanic? Explain your answer (use full sentences, no
bullet points!)
Answer: Continental is older because oceanic crust is constantly
regenerating by subducting under the continental crust and into the
mantle
●● Lab 2: Explain the sequence of geologic events that led to the way
the UConn campus looks today:
Answer: 1. Neoproterozic-Paleaozoic
2. Pleistocene
3. Holocene
4. Anthropocene
●● Lab 2: Neoproterozic-Paleaozoic (1 Billion to 250 Million years ago)
, Several collision between North American and other continents
a) deposition of sediments on horsebarn hill
b) building of Uconn
c) growth of the forest, like you've seen all around you when you were at
the top of horsebarn hill
d) erosion of hilltops in the area around storrs
e) formation of bedrock seen at church rock
f) formation of a locak drainage pattern, such as roberts brook
g) artifical alteration of drainage patterns, such as building an artificial
lake as swan lake
Answer: E
●● Lab 2: Pleistocene: ( 2.6 million years ago to 12,000 years ago)
Several Ice ages came and went with massive glaciers sitting on top of
New England
a) deposition of sediments on horsebarn hill
b) building of Uconn
c) growth of the forest, like you've seen all around you when you were at
the top of horsebarn hill
STUDY GUIDE WITH COMPLETE
SOLUTIONS
●● Lab 1: standard deviation
Answer: a computed measure of how much scores vary around the mean
score
●● Lab 1: oceanic vs continental crust
Answer: mantle is the densist; oceanic crust is thin and dense under the
ocean; continental crust is thick and least dense (oceanic crust subducts
under because it's the most dense)
●● Lab 1: isostacy
Answer: how high the crust floats on the mantle
●● Lab 1: how does isostasy apply to the crust/mantle system?
Answer: the most dense crust subducts and the least dense 'floats'
maintaining equilibruim
●● Lab 1: peridotite
Answer: mantle and densest
,●● Lab 1: basalt
Answer: oceanic and medium density
●● Lab 1: andesite
Answer: continental and least dense
●● Lab 1: oceanic crust
Answer: dense, thinner, likely to undergo subduction, younger crust
●● Lab 1: continental crust
Answer: less dense, thicker, less likely to undergo subduction, older
●● Lab 1: Question 3.4:
make a scale sketch of a cross-section of continental crust in contact
with oceanic crust and ocean water overlying the oceanic crust. pay
attention to the relative thickness and heights of the two types of crust as
well as the depth of the water. the average depth of the ocean floor is
12,100 ft
Answer: Draw a cross-section (like this picture, make sure to include the
12,000 ft mark and arrows pointing where the crust goes.
●● Lab 1: 3.5:
Lets tie what we've learned in parts 1 and 3 together. match the
following options to either oceanic crust or continental crust:
,a) composed of denser rocks/composed of less dense rocks
b) thicker/thinner
c) More/less likely to undergo subduction
Answer: Oceanic Crust: Denser rocks, thinner, more
Continental Crust: Less Dense rocks, thicker, less
●● Lab 1: 3.6:
Relating to 3.5, which rocks do you think are older on average? those in
continental or oceanic? Explain your answer (use full sentences, no
bullet points!)
Answer: Continental is older because oceanic crust is constantly
regenerating by subducting under the continental crust and into the
mantle
●● Lab 2: Explain the sequence of geologic events that led to the way
the UConn campus looks today:
Answer: 1. Neoproterozic-Paleaozoic
2. Pleistocene
3. Holocene
4. Anthropocene
●● Lab 2: Neoproterozic-Paleaozoic (1 Billion to 250 Million years ago)
, Several collision between North American and other continents
a) deposition of sediments on horsebarn hill
b) building of Uconn
c) growth of the forest, like you've seen all around you when you were at
the top of horsebarn hill
d) erosion of hilltops in the area around storrs
e) formation of bedrock seen at church rock
f) formation of a locak drainage pattern, such as roberts brook
g) artifical alteration of drainage patterns, such as building an artificial
lake as swan lake
Answer: E
●● Lab 2: Pleistocene: ( 2.6 million years ago to 12,000 years ago)
Several Ice ages came and went with massive glaciers sitting on top of
New England
a) deposition of sediments on horsebarn hill
b) building of Uconn
c) growth of the forest, like you've seen all around you when you were at
the top of horsebarn hill
