| A | B |
|---|
| 21% of atmosphere | oxygen |
| gas we have most of (78%) | nitrogen |
| photochemical smog | chemicals reacting to sunlight |
| harmful substances | pollutants |
| amount of mass in given substance | density |
| form to measure air pressure | millibars |
| instrument to measure air pressure | barometers |
| warmest layer of atmosphere | thermosphere |
| oxygen in stratosphere to protect Earth | Ozone |
| Radio and TV waves are here | exosphere part of thermosphere |
| 2 layers of thermosphere | ionosphere & exosphere |
| where weather occurs | troposphere |
| particles of carbon in air from burning wood or coal | soot |
| sulfur | major acid in acid rain |
| force per unit | pressure |
| layers of atmosphere classified due to this | temperature |
| fire needs to burn | oxygen |
| weather | condition of atmosphere at a certain time and place |
| aurora borealis | northern lights in ionosphere |
| mesosphere | where meteoroids burn up |
| 4 layers of atmosphere | troposphere, stratosphere, mesosphere, thermosphere |
| 2 types of barometers | mercury & aneroid |
| distance above sea level | altitude |
| amount of mass in air | density |
| plants need this to make food | carbon dioxide |
| causes most of air pollution | burning of fossil fuels |
