| A | B |
|---|
| weather | condition of Earth's atmosphere at a particular time & place |
| ozone | a form of oxygen with three oxygen atoms in each molecule |
| atmosphere | layer of gases surrounding the Earth |
| water vapor | gaseous state of water |
| pollutant | harmful substances in air, water, or soil |
| acid rain | rain with a higher level of acid than normal |
| aurora borealis | colorful display in sky caused when sun particles interact with gases in the ionosphere |
| density | ratio of mass to volume of a specific substance |
| pressure | force on an area or surface |
| air pressure | force resulting from the weight of a column of air |
| barometer | instument used to measure changes in air pressure |
| altitude | elevation above sea level |
| trophospere | layer of atmosphere where weather occurs |
| stratosphere | division of atmosphere that houses the ozone layer |
| mesosphere | middle and coldest layer of the atmosphere |
| thermosphere | outermost layer of Earth's atmosphere |
| ionosphere | one component of the thermosphere; home of the aurora borealis |
| exosphere | outermost section of the thermosphere |
