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ENSC Exam 2 with Questions Solved 100% Correct| Verified
ENSC Exam 2 with Questions Solved 100% Correct| Verified
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ENSC Exam 2 with Questions Solved 100%Correct| Verified
Describe the main types of fossil fuels, how they formed, and how they are used - ✔✔coal-
used for electric generation (adv- inexpensive, plentiful, much infrastructure to use)
strip mining, under group mining, mountain top removal (strip mining), acid mine drainage
)strip and underground), acid rain (so2 and Nox)
natural gas- gaseous state, 2nd most common in US, 41% efficiency, electricity generation
oil- burned for transportation energy (diesel, gasoline)
Explain the environmental impacts associated with exploration, extraction, and use of different
types of
fossil fuels (including acid rain, acid mine drainage, ecosystem destruction, toxic metals,
fracking, and oil
spills) - ✔✔
Explain nuclear energy, how it works, and its benefits and risks - ✔✔
A population of deer exhibiting exponential growth starts with 500 individuals, and is growing
by 0.1 deer per individual per year. Over the past year, this population has added 50 individuals.
Identify dN/dt in this population. - ✔✔dN/dt = 50
A population 1000 of rabbits is subject to logistic growth. Under normal conditions, this
population grows at a rate of 0.5 rabbits per individual per year; however, the maximum
number of rabbits the ecosystem can hold is 5000. Because of this, only 400 rabbits were added
to the population this year. Identify K in this population. - ✔✔K = 5000
A population of 100 bats has a per capita rate of increase of 0.03. What is its population growth
rate under exponential growth? - ✔✔3 bats
,A population of 1000 spruce trees has a per capita rate of increase of 0.01, and is subject to a
carrying capacity of 2000 spruce trees. Determine its population growth rate. - ✔✔5 spruce
trees
A sedge population grows in a prairie environment with plenty of space, nearly unlimited
resources, and no competition. At this time, this sedge population is most likely undergoing
___________ growth. - ✔✔exponential
A population ecologist tells you that K = 10,000 for the largemouth bass population in Lake
Sinclair. What does this mean? - ✔✔Lake Sinclair can support a maximum of 10,000
largemouth bass
A population of antelope occupy an area of the African savannah. This population was recently
impacted by a fire that swept across the savannah, killing off many individuals. Once the fire
stopped, the remaining antelope faced strong competition amongst themselves for the small
amount of food that remained. From the choices below, identify the density-dependent factor
and its impact on birth rate. - ✔✔Limited food resources, birth rate decreases
Birds such as sparrows and wrens have an approximately equal chance of dying at any point in
their life. Which survivorship type would you expect them to have - ✔✔2
why does the death rate decrease during Stage 2 of the demographic transition? -
✔✔Medical advances become available, providing antibiotics and vaccines
why has fertility decreased from the 1950s to the present, as shown in Figure 3.6 in your
reading? - ✔✔Countries continue to progress through the demographic transition, though at
different rates
How has the human population on Earth changed through time? - ✔✔In the 1600s, we had
approximately 0.5 billion people, but now we have closer to 7 billion.
, How is the education of girls related to population growth? - ✔✔Girls who are in school are
more likely to delay childbearing, resulting in decreased population growth
Which statement is true regarding the population size of India? - ✔✔It will surpass China as
the country with the largest population in 2030
Why did the fertility rate fall to near replacement level in Europe and the US before World War
II? - ✔✔Women desired to have fewer children, and did so through a variety of methods
Which statement best characterizes the views of Thomas Malthus? - ✔✔Population growth
will lead to food shortages, which will cause war and famine - thereby reducing the overall
population
Which pair correctly matches the type of energy with an example? - ✔✔Person jumping off
diving board - kinetic energy
What makes an energy source non-renewable? - ✔✔It is only present in a finite amount, or
takes so long to replenish that it new stores won't be usable to human society
Which two forms of fossil fuels share the most similarities in their formation? - ✔✔Oil and
natural gas
Acid mine drainage is an environmental impact of ______________. - ✔✔underground and
strip mining
Mountaintop removal is a form of __________. - ✔✔strip mining for coal
The fossil fuel responsible for the largest amount of carbon dioxide (CO2) emissions to the
atmosphere is __________ - ✔✔coal
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