| A | B |
|---|
| humidity | the amount of water vapor in the air |
| dew point | temperature at which the air is saturated |
| sling psychrometer | a precise method of measuring humidity |
| hygrometer | measures humidity |
| condensation nuclei | small particles in the air |
| stratus cloud | flat, dull, and gray clouds |
| cumulus cloud | puffy clouds |
| cirrus clouds | thin wispy clouds |
| fog | a cloud that forms on the earth's surface |
| precipitation | any moisture that fall from a cloud to the groud |
| sleet | partially melted grains of ice |
| hail | balls of ice |
| rain guage | measures rain |
| acid rain | rain with gases dissovled in them |
| high altitude clouds | cirrus clouds |
| freezing rain | rain that freezes as it falls to earth |
| rain | liquid precipitation |
| middle altitude clouds | stratus clouds |
| low altitude clouds | cumulus clouds |
| nimbus clouds | rain bearing clouds |
