ESCI LAB FINAL EXAM QUESTIONS WITH 100%
COMPLETE AND CORRECT ANSWERS/A+
GRADE/2024 VERSION
How can you distinguish a valley carved by glacial ice from one carved by flowing
water? - ANSWER-glaciers: broader valleys; U-shaped rivers: steeper valleys; V-
shaped
How can you distinguish sediment transported and deposited by ice from water
transported and deposited sediment? - ANSWER-glaciers: long curved sediment
ridges; intersect the valley's midline almost at right angles; grains of all sizes
depositing in an unsorted mix (glacial till or drift) river: levees or stream terraces tend
to parallel the main stream channel; pebbles, coarse sand, fine sand, silt and mud
deposit in different area but with single area having sediment of the same size
Why does the number of lakes remaining in a recently glaciated area decrease over
time? - ANSWER-rivers take over the land and drain the lakes
Why are there very few surface deposits in the Canadian Shield area? - ANSWER-so
much ice moved across this region that it removed all surface deposits and planed the
area into a relatively low-relief rocky surface with little soil cover
What is unique about the Drift less Area compared to the rest of the Upper Midwest
region? - ANSWER-southwestern WI ice free history; only area in the Upper Midwest
that was never covered by moving ice
How did glaciation lead to the formation of Lake Agassiz? - ANSWER-produced tons
of melt water; ice sheets prevented water from escaping so melt water pooled up along
the margin of the ice sheet to form a large glacial lake
What is the main difference between Recent and Older Glacial Margin areas in terms
of the processes responsible for their present land surfaces? - ANSWER-combination
of ice supply and surface resistance
, ESCI LAB FINAL EXAM QUESTIONS WITH 100%
COMPLETE AND CORRECT ANSWERS/A+
GRADE/2024 VERSION
Be able to explain how glacial processes contributed to the development of the
Minnesota River Valley and the Upper Midwest 'Pinery' - ANSWER-as ice sheets
melted Pines were the first plant to dominate
What was the primary resource of each of these areas from the perspective of 19th
century Euro-American society? - ANSWER-MN river valley: soil
pinery: wood (lumber, timber)
What is the major reason why the number of lakes in a recently glaciated area
decreases over time? - ANSWER-lakes decrease in number as rivers expand and drain
the landscape
What is unique about the drift less area compared to the rest of the Upper Midwest
region? - ANSWER-ice never moved across this area during the last glaciations
What is a moraine? - ANSWER-glacial deposit; signals end of a glacier; glaciers only
move forward
What is the difference between glacial and river sediment? - ANSWER-glacial
sediment-->unsorted river sediment-->sorted
What is the significance of Pine Trees? - ANSWER-like cold weather; as glaciers
melted Pine Trees moved north
Recent glacier margin - ANSWER--rough surface
-piles of sediment from glacier
Lake Agassiz - ANSWER--not a lake anymore (drained)
-very smooth flat surface with almost no features on it
-formed by a melting ice sheet
Canadian Shield - ANSWER--recent glaciers so lots of lakes
COMPLETE AND CORRECT ANSWERS/A+
GRADE/2024 VERSION
How can you distinguish a valley carved by glacial ice from one carved by flowing
water? - ANSWER-glaciers: broader valleys; U-shaped rivers: steeper valleys; V-
shaped
How can you distinguish sediment transported and deposited by ice from water
transported and deposited sediment? - ANSWER-glaciers: long curved sediment
ridges; intersect the valley's midline almost at right angles; grains of all sizes
depositing in an unsorted mix (glacial till or drift) river: levees or stream terraces tend
to parallel the main stream channel; pebbles, coarse sand, fine sand, silt and mud
deposit in different area but with single area having sediment of the same size
Why does the number of lakes remaining in a recently glaciated area decrease over
time? - ANSWER-rivers take over the land and drain the lakes
Why are there very few surface deposits in the Canadian Shield area? - ANSWER-so
much ice moved across this region that it removed all surface deposits and planed the
area into a relatively low-relief rocky surface with little soil cover
What is unique about the Drift less Area compared to the rest of the Upper Midwest
region? - ANSWER-southwestern WI ice free history; only area in the Upper Midwest
that was never covered by moving ice
How did glaciation lead to the formation of Lake Agassiz? - ANSWER-produced tons
of melt water; ice sheets prevented water from escaping so melt water pooled up along
the margin of the ice sheet to form a large glacial lake
What is the main difference between Recent and Older Glacial Margin areas in terms
of the processes responsible for their present land surfaces? - ANSWER-combination
of ice supply and surface resistance
, ESCI LAB FINAL EXAM QUESTIONS WITH 100%
COMPLETE AND CORRECT ANSWERS/A+
GRADE/2024 VERSION
Be able to explain how glacial processes contributed to the development of the
Minnesota River Valley and the Upper Midwest 'Pinery' - ANSWER-as ice sheets
melted Pines were the first plant to dominate
What was the primary resource of each of these areas from the perspective of 19th
century Euro-American society? - ANSWER-MN river valley: soil
pinery: wood (lumber, timber)
What is the major reason why the number of lakes in a recently glaciated area
decreases over time? - ANSWER-lakes decrease in number as rivers expand and drain
the landscape
What is unique about the drift less area compared to the rest of the Upper Midwest
region? - ANSWER-ice never moved across this area during the last glaciations
What is a moraine? - ANSWER-glacial deposit; signals end of a glacier; glaciers only
move forward
What is the difference between glacial and river sediment? - ANSWER-glacial
sediment-->unsorted river sediment-->sorted
What is the significance of Pine Trees? - ANSWER-like cold weather; as glaciers
melted Pine Trees moved north
Recent glacier margin - ANSWER--rough surface
-piles of sediment from glacier
Lake Agassiz - ANSWER--not a lake anymore (drained)
-very smooth flat surface with almost no features on it
-formed by a melting ice sheet
Canadian Shield - ANSWER--recent glaciers so lots of lakes
