| A | B |
|---|
| fog | a cloud at ground level |
| troposphere | the layer of atmosphere where clouds form |
| stratus | low, flat clouds that could produce precipitation |
| cumulus | puffy, white clouds associated with calm dry weather |
| cirrus | high, wispy clouds that may signal a change in weather |
| cumulonimbus | clouds piled high in the sky, dark at the bottom, can bring thunderstorms |
| condensation | the main process behind cloud formation |
| clouds are made up of... | tiny water droplets or ice crystals |
| nimbo or nimbus | rain cloud |
| low stratus | when fog lifts |
| alto clouds | middle level clouds that aften lead to precipitation |
