| A | B |
|---|
| Rocks | remember |
| An unconformity is a | buried erosional surface |
| unconformities represent a | gap in the geologic record |
| precipitation occurs when | warm,moist air rises,expands and cools |
| The half life of radioactive isotope | cannot be changed |
| carbon is used to date | recent organic remains |
| most life forms of the geologic past have | become extinct |
| Warm air is capable of | holding more water vapor than cool air |
| As altitude increases,air pressure | decreases |
| Wind is named for | the direction it comes from |
| wind is caused by | differences in air pressure |
| The closer air temperature is to the dew point | the greater the chance of precipitation |
