| A | B |
|---|
| carbon | element of all living things that makes up 23% of our bodies |
| water vapors | gas that can vary from almost none to as much as 5% of the air |
| stratus | cloud that forms at middle altitudes, layered and covers most of the sky |
| hail | ice circulates and becomes larger, gets heavy and falls to the earth's surface |
| iron | 2nd most abundant metal,along with nickle making up the earth's core |
| sodium | makes up 3% of the earth's crust |
| oxygen | the main component in the earth's crust, ocean and living organisms |
| nitrogen | makes up 78% of the atmosphere |
| argon | keeps the filament in a light bulb from burning |
| burn | oxygen can cause substances to... |
| temperature | a measurement that indicates the amount of heat the air has absorbed |
| humidifier or dehumidifier | changes the air's amount of moisture |
| air pressure | least important to our health and comfort |
| ground level | temperature effects air pressure the most at... |
| silicon | element found in sand and makes up 27% of the earth's crust |
| 21% | percentage of oxygen in the air |
| carbon dioxide | gas that acts like a blanket by burning fossil fuels keeping the earth warm |
| forest fires | Earth's atmosphere is affected by... |
| cumulus | clouds that form at low altitudes resembling puffy, cotton balls and is considered the 'Fair Weatther' clouds |
| cirrus | clouds made of ice crystals signaling rain or snow |
| sunshine, no precipitation | high pressure system brings |
| stationary | cold air and warm air meet and neither can move or over power the other |
| 100% humidity | it will rain or snow at ... |
| troposphere | lowest layer of the atmosphere |
| increasing altitudes | the air thins out at... |
| troposphere-stratosphere | 99% of the air is in the ... |
| holes | developed in the ozone layer over polar areas |
| changing air pressure | causes your ears to pop in higher altitudes |
| high humidity | outside temperature feels hotter in... |
| thermosphere | highest layer of the atmosphere |
| troposphere | layer where weather takes place |
| humidity increases | air cools and clouds bring precipitation when... |
| freezing rain | precipitation freezes after hitting a cold surface |
| stationary front | takes several days to produce clouds and precipitation |
| cumulus-cumulonimbus | clouds that produce severe thunderstorms |
| rapid air movement | storms usually involve... |
| air pressure decreases | when altitude increases |
| altitude increases | temperature decreases when... |
| gas, liquid, solid particles | phase(s) of matter exiting in our atmosphere |
| gas | phase of matter that is water vapor |
| sea level | where air pressure is greatest below... |
| humidity | amount of moisture in the air |
| altitude | height above or below sea level |
| stratosphere | where the ozone layer exists |
| low humidity | dry, clear weather has |
| exhaust, pollutants, sunlight | produce ozone near earth's surface |
| acid rain | harmful pollutant substance from industrial waste reacting with water |
| car pools | method to reduce pollution |
| fossil fuels | energy source that is a major contributor to air pollution |
| motor vehicles | most significant cause of air pollution |
| low pressure system | can produce snow or rain depending on temperature |
| ozone gas | has three oxygen atoms |
