ENVS 1126 Edward Laws Final LSU
Exam Questions and Answers
NO - Answer- chapter 19 Ozone concentrations accumulate in air if volatile organic
carbon compounds react with which one of the following?
rice, wheat, and corn - Answer- chapter 6 : The three crops that account for about
50% of global food demands are
slow neutrons - Answer- chapter 15 In a nuclear power plant fueled with uranium-
235, what is the purpose of the moderator?
using sheep to eat the grass - Answer- How was the city of Curitiba able to minimize
the cost of keeping the grass trimmed in its greatly expanded system of municipal
parks?
aquifers - Answer- chapter 10 Which one of the following contains the most liquid
freshwater?
Since 1960, the percentage of people living in high-income countries has increased.
- Answer- chapter 8 : Which one of the following statements is not true?
by nitrogen fixation and lost by either anammox or denitrification - Answer-
Biologically available nitrogen can be added to aquatic systems
99.98% - Answer- chapter 20 In the United States, raw wastewater is about
___________ pure water.
smoking - Answer- chapter 17 Which one of the following is the greatest lifestyle-
related cause of death in the United States?
500 ppm - Answer- The amount of biomass on successive trophic levels in a food
chain forms a pyramid in which the biomass on trophic level N+1 is only 20% of the
biomass on trophic level N. If pesticide P is transferred from one trophic level to the
next with 100% efficiency, what will be the concentration of P on trophic level 5 if the
concentration of P on trophic level 2 is 4 parts per million (ppm)?
Roughly 140,000 deaths each year are traced to waterborne diseases - Answer-
chapter 10 Which one of the following statements is not true?
400 - Answer- chapter 4 : A population is growing exponentially with a doubling time
of 10 years. If the size of the population now is 50, what will be the size of the
population 30 years from now?
The city pays the bus companies on the basis of how far the buses travel each day -
Answer- Why did the idea of using bus tokens to pay people from favelas for bringing
in trash to a central location cost the city of Curitiba nothing?
, natural gas - Answer- chapter 14 Most electric power plants built in the United States
since 2000 use which one of the following sources of energy?
water vapor - Answer- chapter 18 Which one of the following gases accounts for the
greatest percentage of the greenhouse effect globally?
polar ice and glaciers - Answer- Which one of the following accounts for the most
freshwater on Earth?
weak acids - Answer- The roots of plants accelerate the weathering (chemical
breakdown) of rocks by releasing _________ .
remove all the carbon dioxide from the stormwater runoff - Answer- chapter 3:
Ecologist Eckhard wants to stop the algal blooms in City Park Lake by reducing the
inputs of essential nutrients to the lake from stormwater runoff. Which one of the
following strategies would have the least effect on the algal blooms?
immigration into the United States - Answer- chapter 9 : The United States and
China have virtually identical fertility rates (1.7) and median ages (38.35). How, then,
would you account for the fact that the population of China is projected to decrease
between now and the end of this century, whereas the population of the United
States is projected to increase?
paper and paperboard - Answer- The single largest component of municipal solid
waste in the United States is
20-29% - Answer- What percentage of municipal solid waste in the United States is
recycled?
ozone - Answer- Which one of the following air pollutants is not a primary pollutant?
transpiration - Answer- The process by which water vapor passes through stomata
from plants to the atmosphere is called
At the end of winter - Answer- chapter 1 : The figure below shows concentrations of
CO2 in the atmosphere from the late 1950s to the present time. In addition to the
long term trend of increasing CO2 concentrations, the concentrations also oscillate
up and down by several parts per million on an annual basis. At what time of the
year would you expect the concentrations to be highest?
France - Answer- chapter 15 Which of the following countries generates the greatest
percentage of its electricity from nuclear power plants?
2 - Answer- chapter 5 : The ecological efficiency in a food chain is 15%. A pollutant
(X) is transferred from one trophic level to the next with an efficiency of 45%. The
concentration of X on trophic level 3 is 18 ppm. What is the concentration of X on
trophic level 1?
Exam Questions and Answers
NO - Answer- chapter 19 Ozone concentrations accumulate in air if volatile organic
carbon compounds react with which one of the following?
rice, wheat, and corn - Answer- chapter 6 : The three crops that account for about
50% of global food demands are
slow neutrons - Answer- chapter 15 In a nuclear power plant fueled with uranium-
235, what is the purpose of the moderator?
using sheep to eat the grass - Answer- How was the city of Curitiba able to minimize
the cost of keeping the grass trimmed in its greatly expanded system of municipal
parks?
aquifers - Answer- chapter 10 Which one of the following contains the most liquid
freshwater?
Since 1960, the percentage of people living in high-income countries has increased.
- Answer- chapter 8 : Which one of the following statements is not true?
by nitrogen fixation and lost by either anammox or denitrification - Answer-
Biologically available nitrogen can be added to aquatic systems
99.98% - Answer- chapter 20 In the United States, raw wastewater is about
___________ pure water.
smoking - Answer- chapter 17 Which one of the following is the greatest lifestyle-
related cause of death in the United States?
500 ppm - Answer- The amount of biomass on successive trophic levels in a food
chain forms a pyramid in which the biomass on trophic level N+1 is only 20% of the
biomass on trophic level N. If pesticide P is transferred from one trophic level to the
next with 100% efficiency, what will be the concentration of P on trophic level 5 if the
concentration of P on trophic level 2 is 4 parts per million (ppm)?
Roughly 140,000 deaths each year are traced to waterborne diseases - Answer-
chapter 10 Which one of the following statements is not true?
400 - Answer- chapter 4 : A population is growing exponentially with a doubling time
of 10 years. If the size of the population now is 50, what will be the size of the
population 30 years from now?
The city pays the bus companies on the basis of how far the buses travel each day -
Answer- Why did the idea of using bus tokens to pay people from favelas for bringing
in trash to a central location cost the city of Curitiba nothing?
, natural gas - Answer- chapter 14 Most electric power plants built in the United States
since 2000 use which one of the following sources of energy?
water vapor - Answer- chapter 18 Which one of the following gases accounts for the
greatest percentage of the greenhouse effect globally?
polar ice and glaciers - Answer- Which one of the following accounts for the most
freshwater on Earth?
weak acids - Answer- The roots of plants accelerate the weathering (chemical
breakdown) of rocks by releasing _________ .
remove all the carbon dioxide from the stormwater runoff - Answer- chapter 3:
Ecologist Eckhard wants to stop the algal blooms in City Park Lake by reducing the
inputs of essential nutrients to the lake from stormwater runoff. Which one of the
following strategies would have the least effect on the algal blooms?
immigration into the United States - Answer- chapter 9 : The United States and
China have virtually identical fertility rates (1.7) and median ages (38.35). How, then,
would you account for the fact that the population of China is projected to decrease
between now and the end of this century, whereas the population of the United
States is projected to increase?
paper and paperboard - Answer- The single largest component of municipal solid
waste in the United States is
20-29% - Answer- What percentage of municipal solid waste in the United States is
recycled?
ozone - Answer- Which one of the following air pollutants is not a primary pollutant?
transpiration - Answer- The process by which water vapor passes through stomata
from plants to the atmosphere is called
At the end of winter - Answer- chapter 1 : The figure below shows concentrations of
CO2 in the atmosphere from the late 1950s to the present time. In addition to the
long term trend of increasing CO2 concentrations, the concentrations also oscillate
up and down by several parts per million on an annual basis. At what time of the
year would you expect the concentrations to be highest?
France - Answer- chapter 15 Which of the following countries generates the greatest
percentage of its electricity from nuclear power plants?
2 - Answer- chapter 5 : The ecological efficiency in a food chain is 15%. A pollutant
(X) is transferred from one trophic level to the next with an efficiency of 45%. The
concentration of X on trophic level 3 is 18 ppm. What is the concentration of X on
trophic level 1?
