Enter your Name:   Enter your E-mail Address:  01. Write out the definitions for the following terms: a. Humidity b. Absolute humidity c. Relative humidity d. Greenhouse effect e. Parts per million 02. When does water evaporate more slowly, under conditions of high humidity or low humidity? 03. Will sweating help cool you down when the humidity is 100%? 04. What gas makes up the majority of the air we inhale? 05. What gas makes up the majority of the air we exhale? 06. A chemist is monitoring the rate at which a certain substance burns. The chemist burns the substance in a fireplace that uses the room's air supply. The chemist then repeats the experiment, this time in a chamber whose air mixture is 50% oxygen and 50% nitrogen. In which trial will the substance burn the fastest? 07. Why is it important to have ozone in earth's air? 08. For good health, should we increase or decrease the concentration of ground-level ozone in the air? 09. Is global warming happening today? 10. Convert 1% into ppm. 11. The concentration of nitrogen oxides in the air today is about 0.019 ppm. What is that in percent? 12. What pollutant concentration was decreased by the mandate of catalytic converters?