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ENV100 Chapter 16 Questions with 100% Actual correct answers | verified | latest update | Graded A+ | Already Passed | Complete Solution CA$17.02
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ENV100 Chapter 16 Questions with 100% Actual correct answers | verified | latest update | Graded A+ | Already Passed | Complete Solution

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ENV100 Chapter 16 Questions with 100% Actual correct answers | verified | latest update | Graded A+ | Already Passed | Complete Solution

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  • July 10, 2024
  • 6
  • 2023/2024
  • Exam (elaborations)
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ENV100 Chapter 16
benefits of developing alternatives to fossil fuels - CORRECT ANSWER--solves
problem of fossil fuel depletion
-reduces GHGs
-protect economies from market volatility
-new jobs and industries

EROI - CORRECT ANSWER-energy obtained / energy invested

non renewable EROI - CORRECT ANSWER-ratios decline when we extract the
easiest deposits first and then must work harder to extract the remaining reserves

renewable EROI - CORRECT ANSWER-tends to improve over time

hydro, nuclear, biomass - CORRECT ANSWER-are "conventional"
energy alternatives - have been in use for a long
time; make up significant part of some nation's
energy mix

nuclear power - CORRECT ANSWER-energy extracted from the force that binds
atomic nuclei together

• emit very little CO2 per unit of energy production
• much less local air pollution than fossil fuels

nuclear energy - CORRECT ANSWER-the energy that holds together protons and
neutrons within the nucleus of an atom

nuclear fission - CORRECT ANSWER-the splitting apart of an atomic nuclei

each split nucleus releases heat, radiation &
neutrons

nuclear reactor - CORRECT ANSWER-device in a power plant
• fissionable material is packed in fuel rods in the reactor core
• nuclear reactions (fission) are induced in the fuel
• a moderating fluid keeps the reactions in the core under control
• these reactions release energy and heat, creates steam, which turns a turbine to
generate power
• everything is done remotely

radioactive waste disposal is problematic - CORRECT ANSWER-• long half-lives of
uranium,

, plutonium, and other
radioisotopes cause them to
continue emitting radiation
for thousands of years
• proposed solutions for
permanent disposal of high-
level radioactive waste
involve storage by
geological isolation and a
"multiple barrier" approach
• expensive and uncertain

big concerns for nuclear power - CORRECT ANSWER-cost, safety waste

nuclear fusion - CORRECT ANSWER-forcing together the nuclei of lightweight
elements under extremely high temperature and pressure
• scientists have not yet achieved "cold" fusion useable for commercial power
generation
• if we could control fusion, we could produce vast amounts of energy from water

hydroelectric power - CORRECT ANSWER-uses the kinetic energy of moving water
to turn turbines and generate electricity

two approaches (the first is much more common):
• "Big hydro": Dams harness kinetic energy by storing
water in reservoirs, then releasing it - the
"impoundment" approach
• "Small hydro": Run-of-river and in-stream
technologies generate power without greatly
disrupting the flow of river water

hydropower is... - CORRECT ANSWER-renewable, clean efficient

"new" renewable energy sources - CORRECT ANSWER-• referred to as "new," even
though many have
been used for a very long time, because:
• they are still not used on a very wide
scale
• the technologies are in rapid
development
• they will likely play a much larger role in
the near future

biopower - CORRECT ANSWER-produced when biomass sources are

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