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10 Cards in this Set
- Front
- Back
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Mixture |
A phsycal combination of two or more pure subtances present in variable amounts. |
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What is Matter comprised of? |
Pure substances and Mixtures |
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What are the majore components of Air? |
Nitrogen, Oxygen, Argon, Carbon dioxide, and water vapor(all are colorless gases invisbile to the eye. |
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Is exhaled air different than inhaled? How? |
Yes! Trace amonts of substances may vary in the air. |
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What are the %'s of the air we breath? |
Nitrogen 78%, Oxygen 21% and other gases 1% |
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Percent |
Parts per hundred. |
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Water Vapor |
The gas we think of as humidity |
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What happens in the process of respiration-Inahling and exhaling air? |
When we inhale, some changes occur and when we exhale we give off carbon dioxide and water. In the process of repiration, the foods we eat are metabolized to produce carbon dioxide and water. With each breath some of the water in our bodies evaporates from the mosit tissue in our lungs. |
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How do you change a % to ppm? |
Move the deimal point four places to the right. One ppm (parts per million) is a unit of concentration 10,000 times smaller than 1%(one part per hundred). |
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What are the four gases that contribute to air pollution as the surface of the Earth? |
Carbon monoxide (odorless), ozone, sulfur dioxide and nitrogen dixide(all have odor). |
