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.
A very interesting property of the europium ions is their bright red (Eu 3+) and bright blue (Eu 2+) luminescence. The red luminescence has been instrumental in identifying the element and it is of great practical use today.uropium oxide is a compound made of europium metal and oxygen. Europium reacts strongly with oxygen in the air, catching fire spontaneously. Europium oxide phosphors are also used in printing postage stamps. These phosphors make it possible for machines to read a stamp and know what its value is.