Particulate air pollutants
A. are chiefly produced by human activities, not natural processes.
B. are unsightly but not unhealthy.
C. typically have short residence times in the atmosphere.
D. All of the choices are correct.
Answer: C
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A wagon is being pulled with a constant force while its mass decreases. Acceleration of the wagon
A. will be zero. B. remains the same. C. increases. D. decreases.
If 1,500 people migrate into Goodhue, MN and 1,000 people move out, net migration is
A) 2,500. B) 1,500. C) 1,000. D) 500. E) negative 500.
Which animal is most to blame for the loss of forests in Southwest Asia and North Africa?
A) horses B) the gypsy moth C) camels D) goats E) cows
The widely dispersed Jews observe holidays based on the ________ calendar as a way to connect with the ethnic roots of their religion
A) Gregorian B) Jewish C) Julian D) Hebrew E) agricultural