Describe the important aspects of wind speed and direction on dispersal of air pollution
What will be an ideal response?
Answer: Strong winds aid in the dispersal of pollutants in two ways. First, they rapidly transport emissions from their source and spread them over a wide horizontal extent. Greater wind speeds also lower the pollution concentration indirectly. Recall from Chapter 3 that air does not flow uniformly in a given direction. Instead, it contains small, swirling motions, called eddies, that mix the air vertically. This forced convection increases with wind speed and, as a result, strong winds favor greater vertical dispersion. Short-term variations in wind direction also affect dispersion. If the wind direction varies only slightly through time, pollution will be concentrated within a relatively narrow area downwind of the source. If wind directions are highly variable, the pollutants will spread out over a wider area.
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A) right on top of your location. B) a mile from your location. C) three miles from your location. D) fifteen miles from your location.
Which is the most important molecule in the ecosystem?
A) salt B) nitrogen C) water D) lead E) oxygen
Which of the following chemicals is least likely to irritate breathing passages?
A) ozone B) sulfur dioxide. C) nitric oxide. D) nitrogen dioxide. E) lead.
This scientist determined the nature of the forces that kept the planets in their orbits
A) Galileo B) Tycho Brahe C) Nicolaus Copernicus D) Sir Isaac Newton