| A | B |
| atmosphere | gases that surround Earth |
| air pressure | force of air on a surface |
| troposphere | layer of atmosphere nearest Earth's surface |
| ozone | gas that protects us from UV radiation |
| stratosphere | layer of atmosphere containing ozone layer |
| thermosphere | top layer of atmosphere |
| radiation | heat transfer via waves |
| electromagnetic waves | type of waves that transfer heat, light, etc. |
| conduction | heat transfer by contact |
| convection | heat transfer by cycles in fluids |
| greenhouse effect | when heat comes into the atmosphere and gets trapped |
| global warming | human-caused change in Earth's temperatures |
| wind | the movement of air |
| coriolis effect | curving of wind's path due to Earth's spinning |
| air pollution | contamination of air by smoke and other sources |
| smog | nasty air pollution; you can definitely find it in LA! |
| ventilation | solution for indoor pollution by mixing indoor and outdoor air |
| acid precipiation | acid rain, snow, and sleet |
| bicycles | human-powered vehicles that don't make smog |