1. How does the temperature of water affect the rate of when your fingers prune? By : Kevin Herrera & Herpal Pabla

2. Introduction According to http://kidshealth.org/kid/talk/qa/wrinkly_fingers.html sebum is found on the outermost layer of skin. Due to sebum, your hands do not soak in the water, the water just runs off the skin. Sebum basically protects your hands. Some may believe that your hands become wrinkly because your skin expands. The expanded skin ends up to become wrinkly.http://kidshealth.org/kid/talk/qa/wrinkly_fingers.html According to http://healthcorner.walgreens.com we researched that our skin has a type of waterproof oil which is known as sebum. This indicates that when you are taking a shower the water rolls off your skin. Pruning only occurs on your hand and your feet because those are the body parts where hair is not present which makes your hand wrinkly (Prune).http://healthcorner.walgreens.com Our experiment connects to chemistry because pruning has to deal with high and low skin concentration which determines the rate of when your hands become wrinkly. This research is important because people will find out and have an understanding of when your fingers will prune at a specific temperature of water.

3. Methodology Hypothesis: We believe that the hotter the temperature gets, it would make your fingers prune quicker. Procedure: In our experiment we used Herpal’s thumb, we also used a thermometer stick that measures Fahrenheit, a hot plate to heat up the water, a beaker, and a bucket of water. For this process we put a thermometer stick in the bucket to determine the temperature the water is at, which would help us start our experiment. We would use six different temperatures that goes from the range of 50 to 100 degrees Fahrenheit. After we have done each temperature we would look at the clock and determine how many minutes it took for our hands to prune. This help is have the correct data which helped us determine if our hypothesis was true or not.

4. Data Table : Rate at which finger prunes with temperature 52 Degrees Fahrenheit 6 minutes 63 Degrees Fahrenheit 9 minutes 70 Degrees Fahrenheit 11 minutes 81 Degrees Fahrenheit14 minutes 92 Degrees Fahrenheit16 minutes 101 Degrees Fahrenheit18 minutes

5. Qualitative Observations We observed that the colder the water was the more wrinkly Herpal’s thumb became. As the temperature of the water rose, less wrinkles appeared on Herpal’s thumb. Although less wrinkles appeared at the end Herpal’s thumb became pruned but at a slower rate. When we put the beaker of water onto the hot plate, we observed that the water became foggy for a small amount of time and then it went back to normal.

6. Excel Graph

7. Conclusion & Areas of improvement In conclusion our hypothesis was incorrect because we predicted that the hotter the water the faster it would leave wrinkles on Herpal’s thumb. The correct solution is, the colder the water the faster it left wrinkles on Herpal’s thumb. As you can see on our previous slide, it shows that 52 degrees Fahrenheit was the coldest temperature which was the temperature that left prunes quicker on Herpal’s thumb. We feel that this experiment can be improved by trying more temperatures of water. Another improvement we can add this is to try different types of water such as salt water.