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Hannah's stack
Apologia Physical Science Module 2
| Question | Answer |
|---|---|
| What is humidity? | The moisture content of air |
| What does sweat do for your body? | It cools it down when it becomes overheated. |
| What is absolute humidity? | The mass of water vapor contained in a certain volume of air |
| What is relative humidity? | The ratio of the mass of water vapor in the air at a given temperature to the maximum mass of water vapor the air could hold at that temperature, expressed as a percentage. |
| What is the greenhouse effect? | the process by which certain gases trap heat that radiates from earth. |
| What is parts per million? | the number of molecules of a substance in a mixture for every 1 million molecules in that mixture |
| Why does sweating cool you down? | Because it releases water out onto your skin through your pores, and then evaporates, leaving your skin feeling cool because all the energy is gone. |
| What is the percentage of nitrogen in the air? | 78% |
| What is the percentage of oxygen in the air? | 21% |
| What would happen if you removed all the carbon dioxide in the world? | |
| What would happen if you removed all the ozone in the world? | |
| What makes up the majority of the air that we exhale? | nitrogen |
| Do we exhale more carbon dioxide or more oxygen? | oxygen |
| Does the data indicate any significant global warming? | No |
| Is the air cleaner today or 30 years ago? | today |
| What is a cost/benefit analysis? | |
| What does a catalytic converter do in a car? | |
| What does a scrubber do in a smokestack? | |
| How quickly would water evaporate from a glass if the relative humidity was at 100%? | The water wouldn't evaporate because the air is already at 100%; it can't take any more water. |
| Would a candle at high altitudes burn dimmer, brighter, or the same as a candle at low altitudes? | Dimmer |
| If a scientist would measure the percentages of nitrogen and oxygen in air, would they be greater than, less than, or the same as the dry air percentages? | less than |
| Some people say that their plants grow better when they sing to them or read them stories. Why is this statement true scientifically? | Because they are exhaling carbon dioxide onto it. |
| The concentration of argon in the air is about 0.9%. What is that in ppm? | 9,000 |
| Is ultraviolet light visible to the eye? | No, it isn't. |
| Why is ultraviolet light harmful? | It can damage or kill living tissue |
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HLup2nogood
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