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Env Cond

Ch. 19 - Environmental Conitions Key Terms

Muscle spasms resulting from dehydration. Heat Cramps
A method of heat loss in which a liquid changes from a liquid to a vapor, as with perspiration. Evaporation
A rule that sates if the flash-to-bang calculation is 30 seconds or less, people should seek shelter and not resume outdoor activity until 30 minutes after the last audible thunder. 30/30 Rule
A physical reaction to heat exposure resulting from dehydration and characterized by profuse sweating and extreme weakness or fatigue. Heat Exhaustion
An unusually low body temperature capable of causing cardiac arrest and problems with the central nervous system. Hypothermia
An instrument used to measure relative humidity. Psychrometer
A method of heat loss in which the layer of heated air next to the body is constantly being removed and replaced by cooler air, such as by a fan. Convection
Elevated body temperature such that the body’s internal organs begin to shut down because of excessive heat. Heat Stroke
Moisture in the air. Humidity
A manner of estimating the proximity (miles away) of dangerous lightning by counting the seconds between a flash of lightning and the bang of thunder. Divide the number of seconds by 5 to get the miles away. Flash-to-Bang Method
The release of rays in different directions from a common point; the transfer or loss of heat by or from its source to the surrounding environment in the form of heat waves or rays. Radiation
A measurement of moisture in the air based on the difference between the amount of water vapor in the air and the maximum amount that the air could contain at the same temperature. Relative Humidity
Created by: rusha