example+ISP+entry

Madeline T 2007 - 2008
 * IDENTIFICATION OF MIXTURES USING A BLACK LIGHT **

The purpose of this experiment was to identify whether certain powders were mixtures using a black light. The hypothesis predicted was that the bath powder, baking powder, foot powder, and washing soda would be mixtures. This was because all of these powders were thick and/or clumpy. It was also predicted that the baby powder and powdered sugar would be only one substance. This was because both of these powders were thin. In the first experiment, the black light was shone on each of the plain powders to see if phosphors were in them. Washing soda, foot powder, and powdered sugar had phosphors in them, meaning that they were mixtures. In the second experiment, the black light was shone on powders mixed with vinegar to see if phosphors were in them. Washing soda was the only powder that contained phosphors, meaning that it was a mixture when mixed with vinegar. In the third experiment, the black light was shone on powders mixed with Sprite to see if phosphors were in them. Washing soda, powdered sugar, and foot powder had phosphors, meaning that they were mixtures when mixed with Sprite. In the fourth experiment, the black light was shone on powders mixed with Dr. Pepper to see if phosphors were in them. The baking powder and washing soda had phosphors, meaning that they were mixtures when mixed with Dr. Pepper.
 * ABSTRACT **

An improvement to this experiment would be to use a more precise 100 mL beaker when adding powder to the beaker. This way, the exact amount of powder needed would be used. The amount of powder poured into the beakers would be controlled, and it would not affect the outcome of the experiment. In order to expand the idea of this experiment, creams and soaps could be tested to determine if they are mixtures or substances.
 * EXPERIMENTAL IMPROVEMENTS AND FUTURE EXPERIMENTS **

To read the complete ISP Paper for this experiment, click on the PDF file link below.