# Abstract for Sfp

Topics: Water, Heat, Natural rubber Pages: 2 (458 words) Published: April 21, 2013
The purpose of this experiment was to determine the effects of temperature on the elasticity of rubber bands. There were three hypotheses:
If the 0.157 cm rubber bands are heated to about 100˚C in water for one minute, then the rubber bands will stretch to approximately 60 cm; If the 0.157 cm rubber bands are cooled to 0˚C in water for one minute, then the rubber bands will stretch to approximately 40 cm; If the 0.157 cm rubber bands are left in room temperature water for one minute, then the rubber bands will stretch to approximately 50 cm.

Aside from building the contraption for testing the bands, this experiment was “rinse and repeat” with 3 different temperatures. First, the contraption was built to test the effects of temperature on the elasticity of rubber bands. The three temperatures being tested were 100˚C (boiling), 0˚C (freezing), and room temperature (around 23˚C). 1900 ml of each type of water was put into a pot. A thermometer was put in the water in each different pot to get the water to the correct temperature. When actually testing, a rubber band would be put in the pot of the desired temperature of water for one minute. This would give it time to adjust to that temperature and hopefully get close to the desired temperature. After one minute, the rubber band would be removed and put on the contraption where it would stretch out as much as possible until it breaks. The length it goes (in centimeters) would be a recorded on a table. This would be repeated 10 times for each temperature, making 10 trials each, and 30 trials overall. At the end, when all data is recorded, a graph would be made of this data. Also, the average of each temperature would be added to the graph.

The results were very similar, despite the differing temperatures. Most of the rubber bands only stretched out to 50 cm, even if they were in boiling or freezing water. The shortest average length from all of the trials was 46.7 cm, from the freezing...