ISU_ Geol 324: Exam 3 Questions AND Correct Answers
****Exam 3 Short Answer/Practice Questions**** -
✔✔****Exam 3 Short Answer****
***Lecture 22*** - ✔✔Lecture 22
***Lecture 23*** - ✔✔***Lecture 23***
***Lecture 24 & 25*** - ✔✔***Lecture 24 & 25***
***Lecture 26*** - ✔✔***Lecture 26***
***Lecture 27*** - ✔✔***Lecture 27***
***Lecture 28*** - ✔✔***Lecture 28***
***Lecture 29*** - ✔✔***Lecture 29***
***Lecture 30*** - ✔✔***Lecture 30***
,***Lecture 31*** - ✔✔***Lecture 31***
*This is on Exam 3:*
Acid deposition in the northeastern United States has had a
detrimental impact on both terrestrial and aquatic
ecosystems. For terrestrial ecosystems, the initial effect of
acid deposition involves soil. In aquatic ecosystems, the initial
effect involves zooplankton (i.e., microscopic animals)
Choose one of these two ecosystems and describe how acid
deposition has degraded it.
Organize your answer as a process that starts with a more
thorough description of the initial effect mentioned above
and the consequences for other aspects of your chosen
ecosystem. - ✔✔Initial Effect on terrestrial ecosystems:
Nutrients (Ca and Mg) leached out of soil and aluminum
(toxic) mobilized
(Buildup of sulfates/nitrates in soils → continued acid input
into surface waters even after lowered emissions)
Consequence on terrestrial ecosystems:
,1) Calcium leached from needles = greater sensitivity and
higher mortality due to:
-freezing temperatures and dry conditions
-fungus and insect damage
2) Lower bacterial decay of leaf litter and nutrient leaching →
decrease in sapling growth due to lack of access to soil
nutrients below leaf litter
Initial effect on aquatic ecosystems:
Lower levels of food web are more intolerant of low pH than
most higher levels. Increases the amount of Holopedium
plankton that have low phosphorus content = Lower quality
food for animal higher up in the food web.
Consequence on aquatic ecosystems:
Lower fish diversity in acidic lakes due to pH tolerance of fish
and destruction of food web
*This is on Exam 3:*
If our hypothesis is that enhanced greenhouse conditions
caused the 1C increase in the average global surface
temperature, which two parameters above should be
, modified to test this hypothesis? - ✔✔1) Emissivity of the
atmosphere
2) Temperature of the surface
*This is on Exam 3:*
When are the following pollutants the highest:
1) Ozone
2) VOC
3) PANs
You will be given a graph and will have to correlate each
pollutant with its respective curve. (At which time of the day)
and explain why - ✔✔
*This is on Exam 3:* Carbon Isotope Graph: What is the main
source, Organic Carbons or inorganic carbons (plate tectonics
and volcanoes) - ✔✔The argument that inorganic carbons
cause the rise in CO2 is false because...
The historical (~1880-present) increase in atmospheric carbon
dioxide concentrations is correlated with a large negative
excursion in atmospheric carbon isotopes. This correlation
****Exam 3 Short Answer/Practice Questions**** -
✔✔****Exam 3 Short Answer****
***Lecture 22*** - ✔✔Lecture 22
***Lecture 23*** - ✔✔***Lecture 23***
***Lecture 24 & 25*** - ✔✔***Lecture 24 & 25***
***Lecture 26*** - ✔✔***Lecture 26***
***Lecture 27*** - ✔✔***Lecture 27***
***Lecture 28*** - ✔✔***Lecture 28***
***Lecture 29*** - ✔✔***Lecture 29***
***Lecture 30*** - ✔✔***Lecture 30***
,***Lecture 31*** - ✔✔***Lecture 31***
*This is on Exam 3:*
Acid deposition in the northeastern United States has had a
detrimental impact on both terrestrial and aquatic
ecosystems. For terrestrial ecosystems, the initial effect of
acid deposition involves soil. In aquatic ecosystems, the initial
effect involves zooplankton (i.e., microscopic animals)
Choose one of these two ecosystems and describe how acid
deposition has degraded it.
Organize your answer as a process that starts with a more
thorough description of the initial effect mentioned above
and the consequences for other aspects of your chosen
ecosystem. - ✔✔Initial Effect on terrestrial ecosystems:
Nutrients (Ca and Mg) leached out of soil and aluminum
(toxic) mobilized
(Buildup of sulfates/nitrates in soils → continued acid input
into surface waters even after lowered emissions)
Consequence on terrestrial ecosystems:
,1) Calcium leached from needles = greater sensitivity and
higher mortality due to:
-freezing temperatures and dry conditions
-fungus and insect damage
2) Lower bacterial decay of leaf litter and nutrient leaching →
decrease in sapling growth due to lack of access to soil
nutrients below leaf litter
Initial effect on aquatic ecosystems:
Lower levels of food web are more intolerant of low pH than
most higher levels. Increases the amount of Holopedium
plankton that have low phosphorus content = Lower quality
food for animal higher up in the food web.
Consequence on aquatic ecosystems:
Lower fish diversity in acidic lakes due to pH tolerance of fish
and destruction of food web
*This is on Exam 3:*
If our hypothesis is that enhanced greenhouse conditions
caused the 1C increase in the average global surface
temperature, which two parameters above should be
, modified to test this hypothesis? - ✔✔1) Emissivity of the
atmosphere
2) Temperature of the surface
*This is on Exam 3:*
When are the following pollutants the highest:
1) Ozone
2) VOC
3) PANs
You will be given a graph and will have to correlate each
pollutant with its respective curve. (At which time of the day)
and explain why - ✔✔
*This is on Exam 3:* Carbon Isotope Graph: What is the main
source, Organic Carbons or inorganic carbons (plate tectonics
and volcanoes) - ✔✔The argument that inorganic carbons
cause the rise in CO2 is false because...
The historical (~1880-present) increase in atmospheric carbon
dioxide concentrations is correlated with a large negative
excursion in atmospheric carbon isotopes. This correlation
