| A | B |
|---|
| water vapor | water in a gaseous state |
| air pressure | pressure exerted by the air in a particular area |
| atmosphere | an envelope of gases surrounding the earth that extends about 1000 Km above the surface |
| thermosphere | the topmost layer of the atmosphere - the highest temperatures occur in this layer |
| mesosphere | middle layer that extends from the edge of stratosphere to about 65KM's |
| stratosphere | layer of the atmosphere that contains the ozone layer |
| troposphere | life containing layer of the atmosphere that is closeth to the earth |
| greenhouse effect | the warming of the atmosphere due to the trapping of heat from the sun by carbon dioxide & other gases |
| ozone | gases that form in the stratosphere protecting the earth from UV radiation |
| nitrogen | 78% of the atmosphere is this gas |
| oxygen | only 21% of the atmosphere is this gas |
| carbon dioxide, argon, water vapor | trace gases found in our atmopshere |
| weather | all of this occurs in the troposphere |
