Transcript
True or False? We breathe mostly nitrogen.
True
False
True or False? We breathe mostly nitrogen.
True
Our air is mostly nitrogen. The breakdown of the gases is 79% nitrogen, 21% oxygen, 0.03% carbon dioxide.
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Which of the following is most responsible for global warming?
Change in Earth’s orbit
Increased volcanic activity
Increased production of greenhouse gases
Depletion of the ozone layer
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Which of the following is most responsible for global warming?
Increased production of greenhouse gases
The increased production of greenhouse gases, particularly CO2 from the burning of fossil fuels and deforestation, is responsible for much of the global warming. Other greenhouse gases include water vapor, methane, nitrous oxide, and the two air pollutants, chlorofluorohydrocarbons and halons.
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A thermal inversion affects smog by _____.
allowing the smog to drift into the upper atmosphere
trapping the colder air at ground level, intensifying the smog layer
bringing warmer air to Earth’s surface, dissolving more material into the smog
dissipating the smog
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A thermal inversion affects smog by _____.
trapping the colder air at ground level, intensifying the smog layer
The warm, stagnant upper layer of air traps the cooler air mass containing the smog at the surface.
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True or False? Efforts should be made to decrease or eliminate the greenhouse effect.
True
False
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True or False? Efforts should be made to decrease or eliminate the greenhouse effect.
False
The greenhouse effect traps heat in Earth’s atmosphere and contributes to weather patterns. Decreasing or eliminating it would cool Earth and severely affect the weather. Allowing a sharp increase in the effect warms the atmosphere and also changes weather patterns.
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True or False? Ozone is both a toxin and an important part of our atmosphere.
True
False
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True or False? Ozone is both a toxin and an important part of our atmosphere.
True
Ozone near Earth’s surface is an air pollutant and harmful, causing plant damage and respiratory distress in animals. Ozone in the stratosphere helps to screen out harmful ultraviolet radiation.
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Which animal would be most affected by biological magnification?
Coyote
Deer
Squirrel
Robin
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Which animal would be most affected by biological magnification?
Coyote
The coyote is at the top of the food chain for the animals listed and would receive the highest concentrations of toxic pollutants from the animals it feeds on.
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The presence of excessive nutrients in farm run-off may pollute streams, ponds, and lakes, resulting in rapid growth of plant life and death of animal life. This process is _____.
desertification
biological magnification
aquatic inversion
eutrophication
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The presence of excessive nutrients in farm run-off may pollute streams, ponds, and lakes, resulting in rapid growth of plant life and death of animal life. This process is _____.
eutrophication
Farm run-off (fertilizers, organic waste) as well as organic nutrients from sewage treatment plants, food-processing plants, and paper mills can lead to eutrophication.
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Excessive land use in rural areas, removing vegetation, over-grazing, and depleting soil quality results in _____.
desertification
biological magnification
aquatic inversion
biodiversification
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Excessive land use in rural areas, removing vegetation, over-grazing, and depleting soil quality results in _____.
desertification
Desertification is a major problem since more than half of the world’s population live in rural poverty, depending on the local environment for their survival. As the local environment is transformed from marginal lands into desert, it is no longer suitable for agriculture and cannot support the population.
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