For my KIC presentation, my topic is UV beads. My partner’s name is Kelly. She and I chose to do this topic because in the beginning of the year, we got to do a little with them. Plus, we wanted to do fun experiments with them.
The testable question that we thought of was: When we put UV beads 2 cups of water, one hot and one cold, then go outside to the shade what happens? We thought of this question because we already knew what would happen when we went out in the sun, but we didn’t know about the shade.
UV beads are beads that detect ultra violet rays. Rays are invisible for the human eye so no one can see them. Certain kinds of glass don’t allow ultra violet rays to pass through. In fact, most sunglasse4s have lenses that block the ultra violet rays. Some scientists believe ultra violet radiation causes skin cancer. Most of the shortest ultra violet rays do not reach the earth’s surface. This is fortunate, because extremely shoe waves harm the skin and tissues of the skin. The rays that cause sunburn lie in two portions of the ultra violet range.
To answer the question, first I put the UV beads in the 2 cups of water, the hot water which was 109.4 degrees F, and the cold water which was 60 degrees F. Next I walked outside into the shade with the cups. Then I looked into the cups and saw what happened.
What I discovered was that the beads in the 109.4 degree hot wqater turned light colored , and the beads in the 60 degree cold water turned dark colored. Also in took the beads about 5 seconds in the shade to change to the color.
Some things that kids can maybe do next year could be, put the UV beads in vinegar, or peanut butter.