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D - Science - Unit 7

Chapter - Water in the Atmosphere & Precipitation

What is the most common type of precipitation? rain
What are the 5 types of precipitation? rain, hail, snow, sleet and freezing rain
Which type of precipitation forms only inside cumulonimbus clouds during thunderstorms? hail
How is powdery snow formed? when snow falls through cold, dry air
How are the larger clumps of snow formed? when snow falls through cold, humid air
How is sleet formed? when raindrops fall through a layer of air that is below 0 degrees and freeze into solid ice particles
How is freezing rain formed? when raindrops falling through cold air do not freeze in the air, but do when they touch a cold surface
What are the 3 main types of clouds? cirrus, cumulus & stratus
Which type of clouds are wispy & feathery? cirrus clouds
Where do cirrus clouds form? form only at high levels, above 6 kilometers, where temperatures are very low
What are cirrus clouds made of? ice crystals
Which type of clouds look like fluffy, rounded piles of cotton? cumulus clouds
Where do cumulus clouds form? form at less than 2 kilometers above the ground, but may grow in size and height until they extend up to 18 kilometers
What type of weather are cumulus clouds associated with? sunny weather
How do stratus clouds form? form in flat layers
Where are stratus clouds located? low level and they cover all or most of the sky
What is the prefix used in the names of clouds that form between 2 and 6 kilometers? alto-; (means high)
Where is fog most common? in areas near bodies of water or low-lying marshy areas
How does fog form in mountainous areas? forms as warm, moist air moves up the mountain slopes and cools
How is the quantity of water vapor in the atmosphere measured? by the humidity
How do clouds form? forms when water vapor in the air condenses to form liquid water or ice crystals
What 2 conditions are required for condensation? cooling of the air and the presence of particles in the air
What happens if the dew point is above freezing? the water vapor forms water droplets
What happens if the dew point is below freezing? the water vapor may change directly into ice crystals
Created by: lprinke
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