Glossary R

The Environmental Glossary. Letter R +++ Popular Articles: 'Range', 'Renewable energy', 'Range of tolerance'

A Radiometer is an instrument for detecting and measuring the intensity of the sun's energy in the electromagnetic spectrum.

Deutsch: Radiometrische Datierung / Español: datación radiométrica / Português: datação radiométrica / Français: datation radiométrique / Italiano: datazione radiometrica

Radiometric dating in the environmental context is a technique used to date materials such as rocks, carbon, and other geological features based on the decay rate of radioactive isotopes. This method provides critical information about the age of geological formations and has profound implications for understanding the history of the Earth, including its climate, geological events, and the development of life.

A Radionuclide is an unstable form of a Chemical Element that radioactively decays, resulting in the emission of nuclear radiation.

radionuclides are "Versions" of chemical elements that are not stable, or in other words, are susceptible to undergoing radioactive decay.

Radon (Rn) is a cancer-causing radioactive gas found in many communities' ground water. Radon is a colorless, odorless, naturally occurring, radioactive, inert, gaseous element formed by radioactive decay of radium (Ra) atoms.

A RADON (Rn)5 AND RADON DECAY PRODUCTS is Radon is a radioactive gas formed in the Decay of uranium. The radon Decay Products (also called radon daughters or progeny) can be breathed

A Radon chamber is an airtight enclosure in which operators can induce and control different levels of radon gas and radon decay products.

A Rail includes "heavy" and "light" transit Rail. Heavy transit Rail is characterized by exclusive rights-of-way, multi-car trains, high speed rapid acceleration, sophisticated signaling, and high platform loading. Also known as subway, elevated Railway, or metropolitan Railway (metro). Light transit Rail may be on exclusive or shared rights of way, high or low platform, multi-car trains or single cars, automated or manually operated. In generic usage, light Rail includes streetcars, trolley cars, and tramways.

Deutsch: Regen / Español: Lluvia / Português: Chuva / Français: Pluie / Italiano: Pioggia
Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then precipitated - that is, become heavy enough to fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides suitable conditions for many types of ecosystem, as well as water for hydroelectric power plants and crop irrigation.

A rainforest is a large, dense forest in a hot, humid region (tropical or subtropical).

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