| Term | Definition |
|---|
| what are the components of air? | nitrogen, oxyge, argon, carbon dioxide, and water |
| can the air we breathe be dangerous, why or why not? | yes. when it has air pollutants in it |
| what are air pollutants? | carbon monoxide, nitrogen dioxide, ozone, sulfur dioxide, particle matter, lead |
| what is particle matter? | soot, dirt, bateria, some viruses |
| what are the compositions of inhaled air? | 78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide, 0.0% water |
| what are the compositions of exhaled air? | 75% nitrogen, 16% oxygen, 0.9% argon, 4.0% carbon dioxide, 4.0% water |
| is nitrogen reactive or unreactive? | unreactive |
| what is the clean air act of 1970? | program from the government to try to eliminate exposure to harmful air pollutants |
| what is the role of oxygen? | burning, rusting, metobolism |
| what is a mixture? | physical combination of two or more substances present in variable amounts |
| parts per hundred | percent |
| 75% in pph | 75/100 |
| risk assessment | evaluating scientific data and making predictions in an organized manner about the probabilities of an occurance |
| toxicity | intrinsic health hazard of a substance |
| exposure | the amount of the substance encountered |
| elements | substance that can not be broken down into simpler ones by any chemical means |
| compounds | pure substances made up of two or more elements in a fixed, characteristic chemical combination |
| molecule | the smallest particle into which an element or compound can be divided without changing its chemical and physical properties |
| troposphere | the region of the atmosphere that lies directly above the surface of the earth |
| stratosphere | the region of the atmosphere above the troposphere that includes the ozone layer |
| mesophere | the region of the atmosphere above an altitude of 50km |
| ozone layer | the stratosperic region of maximum ozone concentration |
| matter | anything that has mass and takes up space |
| can matter be separated by a physical process? if yes what, if no what is it? | if it can then its a mixture, if not its a pure substance |
| is H20 a compound or element | compound |
| CO2 | compound |
| Nickel (Ni) | element |
| Fluorine (F2) | element |
| table salt (NaCI) | compound |
| air (N2O2, Ar) | mixture |
| C + O2 ----- CO | 2 C + O2 ----- 2 CO |
| 8.5 * 10 to the 4th power | 85,000 |
| 1.0 * 10 to the 7th power | 10,000,000 |
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