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EGEE 102 EXAM 2 Study Questions with Accurate Answers
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EGEE 102 EXAM 2 StudyGreenhouse gases in the air around us are increasing - answer True. Scientists know
for certain that human activities are changing the composition of Earth's atmosphere.
Increasing levels of greenhouse gases in the atmosphere, like carbon dioxide (CO2),
have been well documented since pre-industrial times. There is no doubt this
atmospheric buildup of carbon dioxide and other greenhouse gases is largely the result
of human activities.
As a result of global warming, global precipitation would - answer Increase. Changing
climate is expected to increase both evaporation and precipitation in most areas of the
United States.
Which one of the following causes global climate change? Increase in the concentration
of greenhouse gases in the atmosphere due to human activity, More UV light coming
in,OR The hole in the ozone layer. - answer Increase in the concentration of
greenhouse gases in the atmosphere due to human activity. It's well accepted by
scientists that greenhouse gases trap heat in the Earth's atmosphere and tend to warm
the planet. By increasing the levels of greenhouse gases in the atmosphere, human
activities are strengthening Earth's natural greenhouse effect. The key greenhouse
gases emitted by human activities remain in the atmosphere for periods ranging from
decades to centuries.
Which of these is responsible for increasing atmospheric CO2?burning of fossil fuels
photosynthesis
algae growth
forestation - answerburning of fossil fuels. Photosynthesis, forestation and algae growth
uses CO2 and sunlight to produce chemical energy.
Global warming occurs when - answerthe total energy leaving the earth is less than the
energy entering the atmosphere.
Which one of the following chemicals leads to the destruction of ozone?
PHDs
VOCs
CFCs - answerCFCs. Ozone depletion is caused by chlorofluorocarbons (CFCs) and
other ozone depleting substances
Carbon monoxide is the only product when burning coal. - answerFalse.In case there is
not enough oxygen for complete oxidation, carbon monoxide (CO) may form. The
carbon the fuel combines with the oxygen in the air used for burning and forms carbon
dioxide. In case there is not enough oxygen for complete oxidation, carbon monoxide
, (CO) may form. Hydrogen (H) in the fuel oxidizes by combining with oxygen (O) and
forms water (H2O).
How many tons of carbon (as carbon dioxide) is released into the air each year? -
answer~20 billion tons
Some of the fuel that does not burn is emitted as unburnt hydrocarbon compounds. -
answerTrue.Some of the fuel (hydrocarbon) may not completely burn and therefore is
released into the atmosphere along with the products.
From the following, pick the odd set of pollutants (i.e. the unmatching combination of
primary and secondary pollutants relative to the other choices): - answerCO, SO2, NOx.
The pollutants that are emitted directly from a combustion process are called "primary
pollutants."
Experts predict that global temperatures will decrease if we decrease CO2 emissions. -
answerTrue
Without the greenhouse effect, Earth would be uninhabitable. - answerTrue. If there
were no greenhouse gases in the atmosphere, the radiation received during the day
time would be escaping in the night and the Earth would be at an average temperature
(including summer, winter, night and day, and all latitudes) of 0 degrees F. At this
temperature, nothing grows on this planet and life cannot be supported.
Sun spots can increase the radiation from the Sun. - answerTrue. Sun spots (intense
flares on the surface) can increase the radiation from the sun.
dependence on fossil fuels is still high - answerabout 80 percent of the total energy in
2021
Fossil fuels are hydrocarbons comprised primarily of the following elements -
answercarbon and hydrogen and some sulfur, nitrogen, oxygen, and mineral matter.
Mineral matter turns into ash when burnt.
Combustion - answerrapid oxidation of the fossil fuel's elements resulting in the
generation of heat. When these elements oxidize (or combine with oxygen), products of
combustion are formed.
Carbon - answerThe carbon in the fuel combines with oxygen in the air to form carbon
dioxide. In the cases where there is not enough oxygen for complete oxidation, carbon
monoxide (CO) may form.
Hydrogen (H) - answerin the fuel oxidizes by combining with oxygen (O) and forms
water (H2O).
Nitrogen - answerturns into nitric oxide (NO) and nitrogen dioxide (NO2).
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