Week #1 Assignment

1.    The concentration of _________________________ in the atmosphere can range from near 0% up to 3 or 4%.

2.    _______ is found in the highest concentrations in the earth's atmosphere.  _______ has the lowest concentration.
       a. argon               b. carbon dioxide               c. nitrogen                   d. oxygen                    e. water vapor

3.    Except for _______, most of the gases in today's atmosphere are thought to have come from volcanoes
       a. carbon dioxide               b. nitrogen               c. oxygen               d. water vapor

4.    Photosynthesis is the source of most of the _______ in the atmosphere.  _______ is the most abundant gas in the
       atmosphere.  The dew point temperature provides a measure of atmospheric _______ concentration.  About 1% of the
       air we breath is _______. (each answer below should be used once)
       a. argon                    b. nitrogen                    c. oxygen                d. water vapor

5.    The highest carbon monoxide (CO) concentrations are usually observed in the  MORNING  AFTERNOON  when the
       air layer next to the ground is  UNSTABLE  STABLE.  (circle one word in each pair)
 
6.    Oxygenated fuels are used in many locations in the  WINTER  SUMMER  to reduce  O3  CO  emissions in automobile
       exhaust.  (CO is carbon monoxide, O3 is ozone)

7.    In an inversion layer, air  PRESSURE  TEMPERATURE  will  INCREASE  DECREASE  with increasing altitude.

8.    People might not be aware of a potentially deadly buildup of _________________________ inside a home because
       this gas is odorless and colorless.

9.    _______ can react with water in clouds to form acid rain.
       a. carbon dioxide     b. carbon monoxide      c. ozone       d. sulfur dioxide

10.  4000 people died during about a one week period in 1952 in _______ making it probably the world's worst air pollution
      disaster ever.
      a. Mexico City       b. New York       c. London       d. Tokyo

11.   _______ is a key ingredient in London-type smog, _______ is the main ingredient in Los Angeles-type
       (photochemical)  smog.
       a. carbon monoxide       b. carbon dioxide       c. ozone       d. sulfur dioxide

12.  Which one of the following is not true of tropospheric ozone?
       a. peak concentrations occur in the morning
       b. a photochemical reaction is involved in its production
       c. secondary pollutant
       d. key ingredient in photochemical smog