earth’s weather weather terms. condensation water cycle water gets into the atmosphere by:...
Post on 19-Dec-2015
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Earth’s WeatherWeather Terms
CONDENSATION
Water CycleWater Cycle
Wat
er g
ets
into
the
atm
osph
ere
by:
EVAPORATION PRECIPITATION
COLLECTION
TRANSPIRATION
Water Cycle
Collection
Water gets into the atmosphere by:
transpiration and evaporation
• Precipitation• Collection
– Run-off– Groundwater
• Evapotranspiration– Evaporation– Transpiration
• Condensation
Water Cycle
collection
A measure of how fast air molecules are movingHIGH – molecules moving molecules
moving rapidly
LOW – molecules moving slowly
SCALE Freezing
Point
Boiling Point
Fahrenheit 32 212Celsius 0 100Kelvin 273 373
Temperature
Temperature Scales
Measurement of Water Vapor
Humidity - the amount of water vapor in the airTemperature affects how much moisture is in the air
Warmer air can hold MORE moisture – molecules are farther apart creating more space for the water molecules to fit in
Dew point – The temperature at which water vapor will condense
Relative Humidity – the amount of water vapor present compared to the amount that could be held at a specific temperature
AIR PRESSURE
Weight of air column
Warmer air is LESS DENSE – low pressure
Cooler air is MORE DENSE – high pressure
PRECIPITATION
RainRainliquid precipitationliquid precipitation
HailHailIce precipitation - ThunderstormsIce precipitation - Thunderstorms
Freezing rainFreezing rain Starts as snow, melts, then refreezes after passing Starts as snow, melts, then refreezes after passing through a THIN cold layer (freezes on contact w/ground)through a THIN cold layer (freezes on contact w/ground)
SleetSleetStarts as snow, melts, then refreezes before hitting the Starts as snow, melts, then refreezes before hitting the groundground
SnowSnowStarts out frozen and stays frozenStarts out frozen and stays frozen
cloud particles become too heavy to
cloud particles become too heavy to
remain suspended in the air
remain suspended in the air
Freezing Rain Sleet
Precipitation
Condensation Nuclei
The aerosol particle in the atmosphere around which a water droplet forms