The Great Smokies got their name because natural VOCs created haze. Does this mean we do not need to be concerned about the effects of air pollution in the Park?
What will be an ideal response?
No, we still should be concerned. The sorts of VOCs plants emit (mainly the
compounds terpene and isoprene) can cause the Smokies to "smoke," but the amounts are
dependent on conditions. As the book notes, damaged plants emit greater amounts of
VOCs, and the greater the carbon dioxide concentration, the greater the emission of natural
VOCs. Exposure to anthropogenic VOCs can increase releases from natural sources as
well.
Younger trees generally emit more VOCs than older trees, and some species emit much
more than others. Commercial tree plantations in the south are a large source of VOC
emission increase, and selective logging in forests can cause increases in emissions as well.
In addition, the atmospheric lifetimes of natural VOCs is generally short. Many
anthropogenic VOCs persist in the atmosphere and can travel long distances.
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Which of the following magnetic materials has domains?
A. paramagnetic B. diamagnetic C. solenoidic D. amperic E. ferromagnetic
In the light curve below, what is the period of the eclipsing binary?
a.
5 days
b.
32.5 days
c.
7.5 days
d.
42.5 days
e.
50 days
The lens in your eye and the cornea both contribute to image formation
a. True b. False Indicate whether the statement is true or false
What is one difference between alpha () and beta () radiation?
a. Alpha radiation is more easily stopped by an obstacle than beta radiation. b. Alpha radiation is less easily stopped by an obstacle than beta radiation. c. Alpha radiation is composed of protons and beta radiation consists of electrons. d. Beta radiation is negative, but alpha radiation is always neutral. e. Alpha radiation consists of waves and beta radiation is composed of particles.