Rainbow FireWoodrow Israel, Brooke Troutt (Mr. Miller #447)January, 2018 ABSTRACT”Astronomers can figure out what distant stars are made of (in other words, their atomic composition) by measuring what type of light is emitted by the star. In this science project, you can do something similar by observing the color of flames when various chemicals are burned.” “Rainbow Fire.” Science Buddies, www.sciencebuddies.org/science-fair-projects/project-ideas/Phys_p058/physics/rainbow-fire IntroductionEvery year fireworks have entertained hundreds and thousands of people with their vibrant colors and their exceptional display of pyrotechnics. These vibrant colors of red, orange, gold, yellow, white, green, blue, purple, and silver are indeed fun to watch, but there’s a science behind why fireworks explode in these variety of colors. Research for experimentDifferent chemicals are the independent variables to the dependent variable that is the outcome of the color of the flame produced. In the experiment the different chemicals being tested are 12 grams of: Copper sulfate, Strontium chloride, Boric acid, and Sodium chloride. These different chemicals should lead to the fire producing a different outcome of flame color. Terms and concepts like Fireworks (Explodes when ignited due to chemicals and gunpowder), Metal (typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity), Flame Photometry (Groups 1 and 2 are sensitive to this) , Flame Test (detect the presence of certain elements based on each element’s characteristic emission spectrum), and Spectral Lines(continuous spectrum caused by the absorption or emission of light) are key to understanding the science behind the experiment. Questions:How are the colors produced by a chemical when it burns related to the atomic structure of the chemical?Flame Tests.What is flame spectrometry and how is it used by physicists and chemists?A Flame Spectrometry is is a method of chemical analysis that uses the intensity of light emitted from a flame. Physicists and chemists use flame Spectrometry to determine the quantity of an element in a sample.How does this science project relate to what astronomers do when they are trying to identify the atomic makeup of a star?The Rainbow Fire experiment relates to what astronomers do when they are trying to identify the atomic makeup of a star because how astronomers identify the atomic makeup of a star is something similar by observing the color of flames when various chemicals are burned. In the chemicals used in this science project, which elements in the compounds are metals.Copper Sulfate and Strontium Chloride, Hypothesis: the results is going to be a lot of different color fires because of the chemicals that are burning,and it demonstrates how you can change the color of fire no matter the temperature whether it is cold or hot.