When lava first breaks through the surface of the Earth, it is an extremely hot liquid. On average, fresh lava can be between 1,300Â° F and 2,200Â° F! Depending on its exact temperature, fresh lava usually glows either orange/red (cooler) or white (hotter). Eventually, lava cools and returns to solid rock again.
Eutrophication is the process of increase of plant nutrients in water with the consequent. increase in the growth of algae and higher plants. This process is facilitated by external. and internal (such as nitrogen fixation) sources of nutrients. Input of nutrients may be. from point or diffuse sources.
Europium is the most reactive of the rare earth elements. There are no commercial applications for europium metal, although it has been used to dope some types of plastics to make lasers.Since it is a good absorber of neutrons, europium is being studied for use in nuclear reactors.Europium oxide (Eu 2 O 3), one of europium's compounds, is widely used as a red phosphor in television sets and as an activator for yttrium-based phosphors.uropium is pronounced as yoo-RO-pee-em. History and Uses: Europium was discovered by Eugene-EugÃ¨ne Antole, demarcay DemarÃ§ay a, french chemist. In 1896 demarcay demarÃ§ay suspected that samples of a, recently, discovered element samarium were contaminated with. an unknown element