| A | B |
|---|
| Freezing | a transformation or phase change from liquid to solid |
| Frost | the deposition of water vapor as thin ice crystals on the ground or other surfaces |
| Front | Boundary or transition zone between two air masses of different density |
| Fujita Scale | a scale ranging from F0 (Least) to F5 9 most intensity used to classify tornadoes |
| Global warming | an overall increase in world temperatures that may be caused by additional heat being trapped by greenhouse gasses |
| Greenhouse effect | the natural reuse and retention of atmospheric heat which helps warm the planet |
| Hail | a form of precipitation produved by cumulonimbus clouds and characterized by balls or irregular lumps of ice |
| heat wave | a period of abnormally uncomfortably and even dangerously hot and humid weather |
| humidity | a measure of the water vaper content of the air |
| hurricane | the term used for a tropical cyclone that forms over warm ocean water int he north atlantic or north pacific. |
| Isobars | lines connecting points of equal air pressure on a weather map |
| Kinetic Energy | the energy possessed by a moving body of matter as a result of its motion |
| latent heat energy | heat released or absorbed by a substance during a phase change |
| Lightning | the emission of visable light during a powerful natural electrostatic discharge produced during a thunderstorm |
| Melting | a transformation of phase change from solid to liquid |
| Phase Change | any change in a solid liquid or gas to another physical state |
| radiation | transfer of energy that occurs by thepropagation of electromagnetic waves |
| rainbands | regions of heaby thunderstorms beyone the eyewall that spiral outward fromt he center of a hurricane |
| relative humidity | a ration comparing the amount of water vapor in the air with the total amount of water |
| runoff | precipitation that is not absorbed by the ground instead flows downhill to low lying areas and into rivers and streams |
