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5 Science Chapter 8

1,000 miles per hour the rate the earth's surface spins
earth's axis different seasons are caused by the tilt of this
axis the imaginary line running through the earth from North Pole to South Pole
meteorologists scientists who study the weather
warm air lighter than cool air and rises
ground the air that we live is receives most of its warmth from here
winds produces by temperature differences on the earth
sun basic cause of all weather
100% air is saturated when the humidity of the air is at this percent
dew point the lowest possible temperature at which air is able to hold all of its water vapor
frost water vapor that condenses and forms frozen water on the ground
condensation process in which water vapor leaves the air and changes into liquid water
relative humidity amount of water that the air can hold at a given temperature
freezing rain falling ice crystals melt, hit the earth as liquid rain, but refreeze as soon as they land
rain an ice crystal in a cloud becomes too heavy, falls, melts, and lands on the earth as liquid water
wet snow falling ice crystals melt slightly, stick, and freeze together into snowflakes
dew water vapor that condenses to form liquid water on the ground
hail a small piece of ice is tossed up and down inside a cloud, forming several layers of ice, until it is too heavy and falls to earth
sleet falling ice crystals melt into raindrops, then refreeze and land on earth as tiny pieces of ice
nimbus term used to describe a cloud from which rain is falling
stratus family layers of flat clouds
cirrus family wispy, curly clouds very high in the atmosphere
cumulonimbus cloud also known as "thunderhead"
stratus clouds sheets of clouds that often produce rain
cumulus family puffy, bulgy clouds
cirrus clouds clouds made of very small ice crystals
thunder rapid expansion of superheated air causes shock waves that we hear
eye the calm region of very low air pressure in the center of a tornado
sheet lightning lightning bolts that do not come in contact with the ground but remain within the cloud
tornado warning issued when meteorologists have spotted a tornado
front boundary between two air masses
lightning produced when opposite electrical charges build up in very tall clouds
step leader thin channel of charged air through which a lightning bolt can travel
squall line the row of thunderheads that builds up in the front of advancing cold air
anvil top broad, flat top of a cumulonimbus cloud
tornado type of storm that packs the most destructive power into the smallest space
Created by: Mrs_CC