Fast and Easy Science Fair Projects: Back in Shape
The Characteristics of Elasticity
Purpose: The purpose is to find he effect of weathering and stretching on the elasticity of a rubber band.
Overview: One characteristic of a material is a measure of its "elasticity." Elasticity is the ability of a material to return to its original shape after it has been stretched or pressed together. Balloons and rubber bands are very elastic. Can you think of other examples?
Have you ever seen a rubber band wrapped around a newspaper or something else that has been outside for some time? Have you ever seen an old rubber band that has been wrapped around something in an attic for many years? Can you observe cracks in the bands? Are they able to be stretched? Do they snap back to a smaller shape?
Hypothesis: After a rubber band has been stretched and exposed to outdoor weathering elements for several days, the elasticity of the rubber band will be affected, and it will not return to its original shape.
- 2 identical rubber bands
- 2 paper clips
- Large empty milk carton
- Nail or awl, to poke a small hole in the milk carton
Procedure: For this project, we'll need a devise to test the elasticity of material.
Gather two identical rubber bands, a large empty milk carton, and two paper clips. Lay the two rubber bands on top of each other to check that they are as equal in shape as possible. The rubber band will be our Constant. Our Variable will be to stretch one rubber band and expose it to weather, while the other will remain unstretched and indoors, protected from weathering.
Bend open the paper clips to make "S" shaped hooks. Carefully poke a hole in the top of a large empty milk carton, and insert a paper clip hook through it.
Hang another paper clip hook on an outdoor clothesline and drape a rubber band on the bottom part of the paper clip hook. Hang the milk carton on the rubber band using the paper clip hook in the carton.
Pour some water into the milk carton. This will create a weight to stretch the rubber band. We want to stretch the rubber bad a lot, but not to the breaking point. Since rubber bands are not all the same, we can't tell you how much water to add to the carton. (Science is not always like a food recipe!) Slowly add more water to the milk carton until it looks like the rubber band is well stretched, but not in danger of breaking.
Leave the rubber band stretching device handing on the clothes line for three or four days. then, carefully, take the device apart and remove the rubber band. Line it up next to the other identical one that you had put aside indoors and compare them. Has the stretched one changed shape? Is it able to completely return to it's original shape?
Inspect the stretched rubber band closely. Are you able to see any cracks, discolorations, or other signs of deterioration caused by the experiment?
Results and Conclusion: Write down the results of your experiment. Come to a conclusion as to whether or not your hypothesis was correct.
Something more: Can you use your stretching device to test the elasticity of other materials or objects?
Thanks for reading this one! Hope you liked it! This is my 45th hub on Fast and Fair Science Fair Projects. This one is extremely easy, useful and fun! I'm sure most of you all out there, enjoyed reading and trying out this one, especially kids! If you want more on Fast and Easy Science Fair Projects, you can try my other Hubs on the same topic. Here are five of my latest Hubs on Fast and Easy Science Fair Projects for you:
- Fast and Easy Science Fair Projects: Siphon Fun
Water drains to own level Purpose: Discover how a siphon works. Overview: A hose or tube can be used to create a "siphon," a device that drains liquids. A siphon will drain liquid from a higher to a...
- Fast and Easy Science Fair Projects: Whirring Button
Torque: Changing the direction of the force Purpose: Learning about torque and changing the direction of a force. A force pulling outward can be changed into a force at a 90-degree angle and it made to do...
- Fast and Easy Science Fair Projects: Sandwater
Erosion caused by friction of glacial ice Purpose: Without taking hundredsof years, we can demonstrate the erosive effect of a glacier. Overview: There are places in the world where the heat of...
- Fast and Easy Science Fair Projects: Walls Don't Move
Newton's 3rd: Action and Reaction Purpose: Understanding the Physics concept of work through force and distance. Overview: Newton's third law of Motion explains that if one body exerts a force on a...
- Fast and Easy Science Fair Projects: Toy Story
Torque-energy storage in a homemade toy Purpose: Determine the optimum (best) number of band windings for an ice-pop toy. Overview: This simple old-time homemade toy demonstrates three concepts of physics...
More by this Author
This is my 34th hub on Fast and Easy Science Fair Projects. This one is extremely easy, highly useful and fun! I'm sure you'll enjoy reading and trying out this one too, especially kids! Cheers! =) ...
The effect of water on Magnetism Purpose: Does water affect a magnetic field? Overview: Sound waves go through both water and air. In fact, they travel farther and faster in water than they do in air. How about...
Creek! Geek! These were the sounds I made, Hello! I'm a broken chair. Just made up if wooden rods nailed together. I was made by a carpenter named Max. He was a cunning fellow who used to cheat on his innocent...