Weather Test
Mrs. Enders
Terms
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- hair hygrometer
- hair becomes longer as relative humidity increases
- weather
- the general condition of the atmosphere at a particular time and place
- runoff
- water moving across the surface of the earth
- tropical air mass
- forms in tropics
- how frost forms
- water vapor turns to solid ice crystals
- condensation
- water changes from a gas to a liquid
- air mass
- large body of air that has uniform physical properties at a given altitude
- Warm front weather
- stratus clouds, steady rain (if warm & moist), clear skies set in and warmer temperatures
- amount of earth's fresh water that is frozen
- 66 percent
- low pressure system characteristics
- regions of rising air, winds move counterclockwise in northern hemisphere, cloudy, stormy
- groundwater
- freshwater located beneath the ground
- humidity
- amount of water vapor in the atmosphere
- continental air mass
- forms over land and is dry
- warm air humidity
- low pressure- high water capacity; molecules move quickly, alot of energy
- earth's water composition
- 97% salt water; 3% fresh water
- precipitation
- moisture falling from the clouds
- High pressure
- anticyclone
- psychrometer
- method to measure humidity using two identical thermometers
- high pressure system characteristics
- regions of descending air, winds move clockwise in northern hemisphere, clear skies, little precipitation, calm conditions
- Cold front weather
- cumulus/cumulonimbus clouds, strong winds, thunderstorms, rain, cooler temperatures
- Low pressure
- cyclone
- electric hygrometer
- measures humidity at high altitudes/ launched in a weather balloon
- sublimation
- water change from a solid (ice) to a gas (water vapor
- Stationary front
- two unlike air masses form a boundary, but neither is moving, steady rain or snow for several days
- Polar air mass
- forms north of 50 degrees or south of 50 degrees
- maritime air mass
- forms over water and is moist
- cool air humidity
- high pressure -low water capacity; molecules move slowly, water molecules join together and condense
- absolute humidity
- measure of the actual amount of water vapor in the air
- air mass types
- continental artic, continental polar, maritime polar, maritime tropical, continental tropical maritime tropical,
- types of precipitation
- rain, snow, sleet, freezing rain, hail
- Cold front
- occurs when cold air mass overtakes warm air mass and cold air forces warm air to rise rapidly
- Important factors in weather
- air pressure, wind, temperature, air moisture
- how dew forms
- air is saturated at night, surrounding air remains warm and hits colder surface
- Major fronts
- cold front, warm front, stationary front, occluded front
- controllers of humidity
- condensation and evaporation
- front
- the sharply defined boundary that forms when two unlike air masses meet
- relative humidity
- ratio of amount of water vapor in the air to the amount of water vapor needed to reach saturation
- Occluded front
- forms when warm air mass is caught between two colder air masses, cloudy skies and precipitation
- water cycle
- water movement between the atmosphere and the earth; powered by the sun's energy
- hydrosphere
- all the water that occurs on earth
- transpiration
- evaporation from plants
- evaporation
- water changes from a liquid to a gas
- ways air mass is classified
- does it form over land or water and what latitude does it form at
- dew point
- temperature at which air becomes saturated
- Warm front
- occurs when warm air mass overtakes cold air mass, advancing warm air moves gradually up and over cold, dense air mass