thermal activity

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• Old Faithful Museum of Thermal Activity — The Old Faithful Museum of Thermal Activity was one of a series of four trailside museums built in Yellowstone National Park in 1929. Funded by a grant of $118,000 from Laura Spelman Rockefeller, the museums interpreted park features for visitors …   Wikipedia

• Thermal Region — /ˈθɜməl ridʒən/ (say thermuhl reejuhn) noun an area of the North Island of NZ, with intense thermal activity, mineral springs, geysers, steaming lakes and earthquake zones …  

• Thermal pollution — is a temperature change in natural bodies of water caused by human influence. The temperature change can be upwards or downwards. In the Northern Hemisphere, a common cause of thermal pollution is the use of water as a coolant, especially in… …   Wikipedia

• Thermal degradation of polymers — is molecular deterioration as a result of overheating. At high temperatures the components of the long chain backbone of the polymer can begin to separate (molecular scission) and react with one another to change the properties of the polymer.… …   Wikipedia

• Thermal depolymerization — (TDP) is a process using hydrous pyrolysis for the reduction of complex organic materials (usually waste products of various sorts, often known as biomass and plastic) into light crude oil. It mimics the natural geological processes thought to be …   Wikipedia

• Thermal energy — is the sum of the sensible energy and latent energy.Internal energy Internal energy – the sum of all microscopic forms of energy of a system. It is related to the molecular structure and the degree of molecular activity and may be viewed as the… …   Wikipedia

• Thermal comfort — Human thermal comfort is defined by ASHRAE as the state of mind that expresses satisfaction with the surrounding environment (ASHRAE Standard 55). Maintaining thermal comfort for occupants of buildings or other enclosures is one of the important… …   Wikipedia

• thermal anomaly — ALASKA VOLCANO OBSERVATORY GLOSSARY A thermal anomaly can be defined as an unexpected increase in the radiant temperature of a pixel relative to its neighbors. Its neighbors may be considered as pixels next to it in the same image and same band,… …   Glossary of volcanic terms

• Activity (chemistry) — In chemical thermodynamics, activity (symbol a) is a measure of the “effective concentration” of a species in a mixture, meaning that the species chemical potential depends on the activity of a real solution in the same way that it would depend… …   Wikipedia

• Thermal optimum — A thermal optimum is either a portion of a specified geological time span in which the average temperature was above that of the average temperature for the entire specified time or the optimum range within which a biological process may take… …   Wikipedia

• thermal — [[t]θɜ͟ː(r)m(ə)l[/t]] thermals 1) ADJ: ADJ n Thermal means relating to or caused by heat or by changes in temperature. ...thermal power stations. ...financial assistance with repair, thermal insulation and improvements to homes through Government …   English dictionary