| A | B |
|---|
| weather | short term state of the atmosphere including tempeature, humidity, precipitation, wind and visibility |
| condition of the atmosphere is affected by ____ | the amount of water in the air |
| water cycle | continuous movement of water from Earth's oceans and rivers, into the atmosphere, into the ground and BACK into the oceans and rivers. |
| humidity | the amount of water vapor in the air |
| as temperature increases | the amount of water vapor the air can hold increases |
| relative humidity | THE WAY TO EXPRESS HUMIDITY;ratio of the amount of water vapor ACTUALLY in the air to the amount if water vapor the air CAN hold at a aset temperature |
| saturated air | 100% humidity |
| condensation | occurs when water vapor cools and changes from a GAS TO A LIQUID |
| evaporation | occurs when LIQUID water changes to water vapor, a GAS |
| condensation causes | clouds to form |
| precipitation | occurs when any form of water falls from the clouds to the Earth |
| runoff | water, usually from precipitation that flows across land and COLLECTS in rivers, streams, and OCEANS |
| two factors that affect relative humidity | water vapor and temperature |
| relative humidity DECREASES | as temperature RISES |
| relative humidity INCREASES | as tempeature DROPS |
| psychrometer | instrument used to measure relative humidity |
| before condensation can occur | air must be saturated (relative humidity of 100%) |
| condensation occurs | when saturated air COOLS |
| dew point | temperature at which a gas condenses to a liquid |
| cloud | colelction of small water droplest or ice crystals SUSPENDED in the air, which forms when the air is cooled and condensatin occurs |
| When clouds are saturated the | form rain, snow, sleet or hail depending on the temperature |
| cumulo | heap |
| stratus | layered |
| cirrUS | curled, feathered |
| nimbus | black |
| cumulus clouds | puffy heap, form when warm air rises, mean good weather |
| cumulonimbus clouds | LARGER cumulus clouds that make thunderstorms |
| stratus clouds | form in layers, coused by a lifting of a large body of air into the atmosphere |
| nimbostratus clouds | dark stratus clouds that produce light to heavy, CONTINUOUS rain |
| fog | a stratus cloud that forms near the ground |
| cirrus clouds | thin, feathery white clouds found at high altitudes that form when the wind is strong |
| cirrO | high altitude clouds |
| cirro cumulus | cumulus clouds that form at high altitude |
| alto | middle altitude |
| clouds are classified by | form and altitude at which they form |
| ALTOstratus clouds form | at middle altitudes |
| cirro or HIGH clouds are made of | ice crystals |
| ALTO or middle clouds are made of | both water drops and ice crystals |
| Low clouds are made of | water drops |
| There is NO Latin prefix to decribe | low clouds |
| 4 forms of precipitation | rain, snow, sleet, hail |
| rain | most common form of precipitation, forms when the water drops in a cloud become a certain size |
| sleet | forms when rain falls thru a layer of freezing air |
| snow | forms when temperatures are so cold that water changes directly tot solid as it falls |
| hail | balls or limps of ice that fall from CUMULONIMBUS clouds |
| As air temperature drops below dew point | the relative humidity os 100% |
| CLOUDS FORM AS AIR | cools to its dew point |
