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| 8841628707 | Troposphere | Ozone found here can be created in small amounts naturally by a lightning storm, but that it is also considered a pollutant and is the primary ingredient in smog. It can harm vegetation by hurting its ability to photosynthesize, as well as cause respiratory illnesses in human beings. | 0 | |
| 8841646001 | Stratosphere | Ozone found here where it is important in protecting us from ultraviolet radiation from the sun. | 1 | |
| 8841650836 | "Good up high, bad nearby" | Describes where ozone is helpful (the stratosphere) and where it is harmful (the troposphere). | 2 | |
| 8842755267 | 2NO + O2 → 2NO2 | Nitrogen oxide (NO) reacts with oxygen gas (O2) to form nitrogen dioxide (NO2), which forms a brownish haze that is characteristic of photochemical smog. | 3 | |
| 8842769419 | NO2 + UV light → NO + O | Nitrogen dioxide (NO2) reacts with ultraviolet light to form nitrogen oxide and oxygen. | 4 | |
| 8842923004 | O + O2 → O3 | The free atom of oxygen (O) bonds to oxygen gas (O2) to form ozone, which is considered a pollutant in the troposphere. | 5 | |
| 8842958717 | Respiratory effects of having too much ozone in the troposphere | -tightness in the chest -reduced lung function -damage to cells in the lung -increased susceptibility to lung infection -aggravation of asthma | 6 | |
| 8843014532 | Sources of ozone | Industrial facilities and automobile emissions, which contribute NOx and VOCs, which create a series of reactions that produce ozone under the influence of sunlight and heat. | 7 | |
| 8843018729 | 2NO + O2 → 2NO2; NO2 + UV light → NO + O; O + O2 → O3 | Reactions describe the formation of ozone in the troposphere? | 8 | |
| 8843056658 | CCl3F + UV light → CCl2F + Cl | CFC decomposes, leaving a free atom of chlorine as a product. | 9 | |
| 8843203229 | Cl + O3 → ClO + O2 | Free atom of chlorine and ozone produce chlorine oxide and oxygen gas. | 10 | |
| 8843333483 | ClO + O → Cl + O2 | With the addition of a free atom of oxygen, chlorine oxide decomposes. | 11 | |
| 8843335974 | Cl + O → ClO + O2 | A free atom of chlorine combines with ozone to produce chlorine oxide and oxygen gas. | 12 | |
| 8859932029 | Ozone-depleting substances | -chlorofluorocarbons (CFCs), propellants, and blowing agents -hydrochlorofluorocarbons (HCFCs), also propellants and blowing agents (and used to replace CFCs) -halons, used in fire protection -methyl bromide, a soil fumigant -carbon tetrachloride, a solvent -methyl chloroform, a cleaning agent | 13 | |
| 8860010397 | Montreal Protocol | An international agreement to reduce production and consumption of ozone-depleting substances. | 14 | |
| 8860023560 | Ultraviolet radiation | With _____ ______, CFCs (such as CCl3F) break down to produce free chlorine atoms (Cl), which, in turn, break down ozone O3. | 15 |
