By Marc-Anthony Thompson Mrs.Orbeso Homeroom

1.Title 2.Table of Contents 3.Question 4.Hypothesis 5.Material 6.Procedures 7.Conclusion 8.Question? 9.Bibliography

Does the amount of stretch of a rubber band affect the distance a rubber band will travel?

Independent Variable-The length the rubber band is stretched. The size of the rubber band. Dependent Variable- Where I conduct my experiment. The kind of rubber band I will use (thick or thin). The size of the rubber band (long or short). Controlled Variable- The size of the rubber band. The length of the rubber band. The item used to measure the length the rubber band went.

The more you stretch the rubber band the further it will travel.

3 1 2 “ x 1 4 “ sized rubber bands Tape measurer Pencil to record in book S harpie to mark where rubber band landed

Kind of Stretch Trial 1Trial 2Trail 3Trail 4Trail 5Trail 6 Full Stretch (8 inches stretch) 579 cm615 cm681 cm690 cm708 cm621 cm Half Stretch (4 inches stretch) 426 cm324 cm489 cm306 cm435 cm477 cm Control (holding out arms) 51 cm60 cm66 cm102 cm72 cm54 cm

1. Take a 3 ½ “x ¼” rubber band to use for trial Then select which kind of stretch you want controlled, half stretch, or full stretch. 3.Then align your feet at the very tip of the measuring tape and flick it to what ever kind of stretch it is. Then walk toward the rubber band and measure how many meters or centimeters it went. 4. Finally keep the rubber band where it is and mark it with sharpie. 5. Repeat this until the end of your experiment.

My hypothesis was correct. The answer is the more you stretch a rubber band the further the rubber band will travel. I know that because on my data collection when I did full stretch those rubber bands traveled the furthest. I think the only problem I had during my experiment was doing it in my house because it could have bounced off of something. The first thing I would to differently is conduct my project in the drive way. The second thing I would do differently is get rubber bands that are the same in length size but half of them will be thick and half of them will be thin.

Does the amount of stretch of a rubber band effect the distance a rubber band will travel? Marc –Anthony Thompson Berwyn Heights Elementary School Grade 6 February 18, 2009 Thank you mom for helping me look up things to research about.

Does the amount of stretch of a rubber band effect the distance a rubber band will travel?

Vulcanized- to harden something with chemical Rubber bands- a short length of rubber and latex formed into the shape of a loop The first rubber band was develop in 1843 when an Englishman named Thomas Hancock sliced up a rubber bottle made by some New World Indians. Hancock himself never vulcanized his invention but he did advance the rubber industry by developing the masticator machine, a forerunner of the modern rubber milling used to manufacture rubber bands as well as other rubber products. In 1845, Hancock’s countryman Thomas Perry patented the rubber band and opened the first rubber band factory. A trait commonly tested is break strength, or whether a rubber band is strong enough to withstand normal strain. If 90% of the sample bands in a batch pass a particular test, the batch moves on to the next test; if 90% pass all of the tests, the batch is considered market-ready. There are five steps to making rubbers one thing for sure is you can’t do it at home. Step one- The rubber is formulated combining the latex (except in latex free). Step two-The rubber compound is processed trough a machine called an “extruder” to form it into a tube shape. It is very similar to the way manicotti noodles are made. Step three-A round pipe is placed into the length of the extruded tubing, then it is subjected into heat in a pressurized autoclave. The pipe forms a round shape of the rubber band, and the heating process is referred to as vulcanization. Step four- The rubber sleeves are removed from the pipe and the vulcanized tubing is cut into “rings” using a high speed cutter. Step five- The rubber bands are thoroughly washed and dried to remove the chemicals in the steps above. After quality inspection the rubber bands are packed in bags or boxes for delivery.

Yikes Wow Yuck by Harris Snoke, Elizabeth and Illustrated by Thompson, Nora