1. What evidence did Susan Solomon discover that led NASA ozone-modeler Paul Newman to reject his hypothesis in favor of her polar cloud hypothesis?

the level of CLO in the stratosphere supported the hypothesis that UV-B breaks down CFCs,
which in turn break down ozone molecules.

2. In an experimental study, the ___________variable is manipulated and the ___________ variable is measured.

independent; dependent

3. Which layer of the atmosphere contains the "ozone layer"?

stratosphere

4. Ozone in the stratosphere is destroyed by reacting with ___________.

chlorine atoms

5. 27. Which of the following is NOT an example of passive solar technology?

photovoltaic cells

6. How do run-of-the-river hydroelectric systems differ from giant dams?

they don't block all of the water flowing down a channel and only direct some of it through a
turbine.

7. Which of the following examples of biomass energy is currently being used at the commercial
   level?

Grain ethanol

8. Methane that escapes landfills and enters the atmosphere is measured by which of the following methods?

Measuring the absorption of infrared light at a frequency particular to methane using
lasers

9. The Troposphere is warmed __________ and the Stratosphere is warmed ___________

bottom-up; top-down

10. Having ozone in the troposphere is _____ and having ozone in the stratosphere is _____.

bad;good