| A | B |
|---|
| Pollutants | are harmful substances that contaminates the environment |
| Where the Air Pollution comes from? | From human activities and natural events |
| Human examples of pollution: | industry, power generation, transportation and agriculture |
| Natural examples of pollution: | forest fires (smoke) and volcano (ashes and toxic gases) |
| Primary Pollutants | Pollutants released directly into the air in a harmful form |
| Secondary Pollutans | Are harmless chemicals when released then chemical reactions in the atmosphere make them form ( smog, ozone) |
| Photochemical Smog | The smog you see near cities forms in a different way. |
| Photochemical smog forms when: | Nitrogen compounds + organic compounds |
| Ozone forms when: | Nitrogen dioxide reacts in the presence of sunlight |
| Landforms can contribute to the formation of: | smog |
| Mention two cities that has mountains all around that trap polluted air | Los Angeles, California- Santiago, Chile |
| What happen during a Temperature Inversion? | Warm air overlies cool air, trapping air pollutants near the gorund |
| Rain is naturally slightly: | acidic |
| What the PH measures? | The acidity |
| Acid PH | 0-6 |
| Neutral PH | 7 |
| Basic PH | 8-14 |
| Acid rain has a PH less than | 5.6 |
| Acid rain can do several damages like: | discolor paints, corrode metals, harm plants and animals |
| When fuels are burned, they release primary pollutants, such as sulfur dioxide and ___________ into the air | nitrogen oxides |
| Where in USA the rain is more acidic | Northeastern States, because sulfur dioxide and nitrogen oxides released from midwestern power plants are carried to the Northeastern |
| Particulate Matter | Air contains suspended solid particles and liquid droplets. It can damage plants, buildings and your lungs |
| Coarse particulate matter | is carried in the wind from dusty, constrcuction sites and they are really small to the eye |
| Fine Particulate matter | is much smaller than coarse. They are released into the air from fires, factories, power plants |
| Toxic Air Pollutants | Are release by human activities, may cause cancer or other health problems |
| Example of a Toxic Air Pollutant | Carbon monoxide-CO. At high concentration is deadly |
| CFC means | Chlorofluorocarbons |
| CFC can destroy the ____ | upper ozone layer |
| The ozone layer is located at___ | 20 km above Earth |
| Ozone is a molecule made of ___ | 3 oxygen atoms |
| How the ozone in the atmosphere helps Earth | By absorbing some of the Sun's harmful rays |
