ENVS 1126 LSU EXAM LATEST
2 (AIXIN HOU)
Which one of the following fossil fuels produces the least amount of air
pollutants?
a. Natural gas
b. Petroleum
c. Oil sand
d. Coal - ANSWERS-a. natural gas
Compared to the generation of electricity using coal, nuclear power -
ANSWERS-generates no sulfur dioxide or carbon dioxide emissions
Enrichment of nuclear fuel - ANSWERS-increases the relative
concentration of uranium-235 to only 3-5% to avoid a nuclear explosion
at higher percentages.
If the radiation you received from your x-ray does pose a health risk,
how can this radiation cause the greatest harm? - ANSWERS-your DNA
in cells that were radiated may be damaged
Which of these is a correct statement regarding a nuclear reactor?
END OF
PAGE
1
, ENVS 1126 LSU EXAM LATEST
2 (AIXIN HOU)
a. Radioactive spent-fuel rods are emptied, refilled, and put back into
production.
b. Moderators speed up neutrons, so they can hit more neutrons and start
a chain reaction.
c. Control rods contain neutron-emitting material that speeds up a chain
reaction.
d. Boiling water reactors use heat from a high-pressure moderator to
make steam to drive a turbogenerator.
e. Fuel rods contain uranium dioxide pellets, which undergo fission -
ANSWERS-e.
Fuel rods contain uranium dioxide pellets, which undergo fission.
Fission and fusion reactions - ANSWERS-convert the mass of the
nuclear materials to energy
Radioactive substance A breaks down to substance B with a half-life of
1,000 years. If we start out with eight kilograms of radioactive substance
A, how much of those eight kilograms of substance A will remain in
3,000 years? - ANSWERS-1 kilogram
END OF
PAGE
2
, ENVS 1126 LSU EXAM LATEST
2 (AIXIN HOU)
Which one of the followings is the world's largest source of carbon
dioxide?
a. Heating
b. Nuclear fission
c. Coal burning
d. Transportation - ANSWERS-c. coal burning
A declining dependency ratio - ANSWERS-permits decreased spending
on education and old-age medical expenses.
A person who dies of a heart attack at the age of 93 is more likely to
have lived in a - ANSWERS-developed country
As a cold front moves into an area of warm, moist air, we would expect
to see cloud formations as - ANSWERS-the warm air rises and
condenses
As environmental systems have declined, human well-being has
improved. What is the most probable reason for this "Environmentalist's
Paradox"? - ANSWERS-Enhanced food production has outweighed
declines in ecosystem services.
END OF
PAGE
3
2 (AIXIN HOU)
Which one of the following fossil fuels produces the least amount of air
pollutants?
a. Natural gas
b. Petroleum
c. Oil sand
d. Coal - ANSWERS-a. natural gas
Compared to the generation of electricity using coal, nuclear power -
ANSWERS-generates no sulfur dioxide or carbon dioxide emissions
Enrichment of nuclear fuel - ANSWERS-increases the relative
concentration of uranium-235 to only 3-5% to avoid a nuclear explosion
at higher percentages.
If the radiation you received from your x-ray does pose a health risk,
how can this radiation cause the greatest harm? - ANSWERS-your DNA
in cells that were radiated may be damaged
Which of these is a correct statement regarding a nuclear reactor?
END OF
PAGE
1
, ENVS 1126 LSU EXAM LATEST
2 (AIXIN HOU)
a. Radioactive spent-fuel rods are emptied, refilled, and put back into
production.
b. Moderators speed up neutrons, so they can hit more neutrons and start
a chain reaction.
c. Control rods contain neutron-emitting material that speeds up a chain
reaction.
d. Boiling water reactors use heat from a high-pressure moderator to
make steam to drive a turbogenerator.
e. Fuel rods contain uranium dioxide pellets, which undergo fission -
ANSWERS-e.
Fuel rods contain uranium dioxide pellets, which undergo fission.
Fission and fusion reactions - ANSWERS-convert the mass of the
nuclear materials to energy
Radioactive substance A breaks down to substance B with a half-life of
1,000 years. If we start out with eight kilograms of radioactive substance
A, how much of those eight kilograms of substance A will remain in
3,000 years? - ANSWERS-1 kilogram
END OF
PAGE
2
, ENVS 1126 LSU EXAM LATEST
2 (AIXIN HOU)
Which one of the followings is the world's largest source of carbon
dioxide?
a. Heating
b. Nuclear fission
c. Coal burning
d. Transportation - ANSWERS-c. coal burning
A declining dependency ratio - ANSWERS-permits decreased spending
on education and old-age medical expenses.
A person who dies of a heart attack at the age of 93 is more likely to
have lived in a - ANSWERS-developed country
As a cold front moves into an area of warm, moist air, we would expect
to see cloud formations as - ANSWERS-the warm air rises and
condenses
As environmental systems have declined, human well-being has
improved. What is the most probable reason for this "Environmentalist's
Paradox"? - ANSWERS-Enhanced food production has outweighed
declines in ecosystem services.
END OF
PAGE
3
