CCell wants to know what CARNIVAL is. When we simply say "it is CARNIVAL !!!!!", our mind IMAGINES "colors" in association with heat, music, light, and constant movement. Acts of sensory perception are related to physicochemical interactions and molecular vibrations. For example, a copper wire shows its bright color, but we can also feel the cold temperature, its characteristic odor and its density. If we warm up the same copper wire, we can see its color changing to red, while at the same time feeling the heat that is emitted and recognizing a new plasticity. How does this happen? The application of energy (calories) to the copper wire has led to changes in our perceptions of "red," "hot," "brilliant" and "flexible." In this example we can SEE how the perceptual process depends on the vibration of particles and changes in frequencies. In the receptors specific to our sensory organs, these changes stimulate reactions that, in turn, are transmitted to the brain in the form of electric impulses through the nervous system. The result is the formation in the cerebral cortex of a complex picture of "red", "bright", etc. that can even display our CARNIVAL !!!!!The effects of incident and reflected lights, shadows, half shadows and darkness create the highlights, contrasts and transitions needed for each body, or group of bodies in CARNIVAL, revealing their latent possibilities in full. In CARNIVAL, music, lights and "dyes" are very important. In paint pigments we find metals such as copper (in combination with Phthalocyanine to form the dye Blue Monastral). With minor changes in Phthalocyanine, replacing hydrogen by chlorine or bromine, the colors change to other shades of blue or green. For now, focusing only on the element that has copper color GOLDEN RED, and the ability to conduct heat and electricity, we remember that it was one of the first metals used by man 5,500 years ago. Copper plus tin makes bronze. Now it is not a big jump to imagine different sorts of bronzed bodies in the Brazilian Carnival: where all the colors are marvels of chemistry.Reference:Acaster, D. Transition Elements. Cambridge University Press 2001. p.33.CARNAVAL, CORES E QUIMICAHaidi Fiedler, INCT-Catalise, UFSC, BrasilCCell quer saber o que e CARNAVAL. Quando simplesmente dizemos e CARNAVAL!!!!!, a mente IMAGINA "cores" em associacao com CALOR, MUSICA, LUZ e MOVIMENTO constante. Atos de PERCEPCAO SENSORIAL estao relacionados com INTERACOES FISICO QUIMICAS e VIBRACOES MOLECULARES. Por exemplo, um fio de cobre mostra sua cor de cobre brilhante, mas podemos sentir o frio do metal, seu odor e sua densidade caracteristica. Se nos aquecemos este fio de cobre, nos podemos ver sua cor se alterando para vermelho e, sentimos o calor que esta emitindo e uma nova plasticidade. Como ocorre isto? A aplicacao de ENERGIA (calor) no fio de cobre induziu mudancas de percepcao que descrevemos como "vermelho", "quente", "brilhante" e "flexivel". Nesse exemplo podemos VER como o processo perceptivo depende da vibracao das particulas e das mudancas nas frequencias. Nos receptores especificos de nossos orgaos sensoriais, estas mudancas estimulam reacoes que, por sua vez, sao transmitidas ao cerebro na forma