Answer the questions based on the material found in the module.

Vocabulary

Understanding each of these terms is important in understanding the story of "When is a little sunshine too much." What does each of these terms mean and why is each important to the story?

ozone electromagnetic radiation Dobson units chlorofluorocarbons ultraviolet radiation

stratosphere photon catalyst gas chromatography reaction rate

Faces and Science

1. Identify each of these faces.

   a	b	c

2. What is meant by the "ozone layer?"

3. What is meant by the "ozone hole?"

4. How did solving the problem of using toxic gases such as ammonia or sulfur dioxide in refrigeration systems lead to an unexpected problem?

5. What is the molecular formula for dichlorodifluoromethane (Freon 12)? Hint: the molecular structure is given on the page Why is Ozone Disappearing?

6. What does this equation represent?
   

7. What are the two faces of ozone?

8. What instrument can be used to identify and measure very small amounts of gaseous pollutants?

9. What is the function of a catalyst in the decomposition of hydrogen peroxide?