20 terms

Topic 5 Weather Systems

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Electromagnetic Energy
All the energy coming to Earth from stars like our Sun. It travels in waves.
wavelength
the distance between to crests or troughs. It seperates one type of energy wave from another.
Evaporation
Phase change: liquid to gas
Latent Heat
The energy gained or released during a phase change. It is "hidden" in the molecules as potential energy.
Phase change
This is when a substance changes from one state to another like soild to liquid. Its very important to remember that during phase changes that the temperature of the substance does not change.
Heat of Vaporization
The heat needed to be GAINED in order for water to evaporate water vaport (2260 J/g). OR the heat needed to be RELEASED in order for water vapor to condense to liquid.
Heat of Fusion
The heat needed to be GAINED in order for ice to melt to water (334 J/g). OR the heat needed to be RELEASED in order for water to freeze to ice.
Station Model
A method of displaying many pieces of weather data in a small space.
Air Mass
An air masses is a large section of the lower atmosphere (troposphere) that has the same temperature and humidity characteristics throughout.
Cold Front
a boundary between forward moving cold air and warm air
Warm Front
a boundary between forward moving warm air and cold air
Hurricane
a large, strong cyclonic storm that forms over tropical ocean waters with sustained winds above 74 miles an hour or greater
Tornado
a narrow, cyclonic destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground. Usually form in T'storms.
Air Temperature and Dew Point Temperature
When Air Temp. and Dew Pt. Temp. are close in value, then condensation is likely occurring which forms clouds.
How would an air pressure of 1023.9 mb be written on a station model?
239 in the upper right corner of the station model
What does the coded air pressure of 897 equal as an actual air pressure value?
It represents 989.7 mb.
climate
average weather conditions taken over an extended period of time
conduction
energy transfer method that works best in solids; energy is transferred by molecular collisions
convection
energy transfer method that works best in fluids; energy is transferred as fluids (gases and liquids) change in density causing less dense fluids to rise (float) and more dense fluids to sink.
radiation
energy transfer that does not need a medium to move through; energy is transferred by waves of energy