| A | B |
|---|
| cloud | a collection of millions of tiny water droplets or ice crystals |
| cumulus | flat-bottomed, puffy, white cloud |
| cumulonimbus | cloud that produces thunderstorms |
| stratus | clouds that form in layers, caused by a gentle lifting of a large body of air into the atmosphere |
| nimbostratus | a cloud that produces light to heavy continuous rain |
| fog | stratus cloud formed when water vapor condenses near the ground |
| cirrus | thin, feathery clouds found at high altitudes |
| cirro- | the prefix used to describe high-altitude clouds |
| alto- | the prefix used to describe middle-altitude clouds |
| strato- | the prefix used to describe low-altitude clouds |
| precipitation | water in solid or liquid form that falls from the air to the Earth |
| snow | precipitation that forms when temperatures are so cold that the water vapor in clouds changes directly to a solid |
| sleet | precipitation that occurs when rain falls through a layer of freezing air |
| glaze | rain that hits the surface of an object or the ground and then freezes |
| hail | solid precipitation that falls as balls of ice |
| rain gauge | an instrument used to measure the amount of rainfall |
| nimbo- | prefix used to indicate a cloud that will likely produce precipitation |
| -nimbus | suffix used to indicate a cloud that will likely produce precipitation |
