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Havana Junior High Science Club

The Weakest Link. Can your team build the longest chain that holds the most weight?. Havana Junior High Science Club. Questions to consider .... What is a chain? What makes a good chain? How can your the materials provided to make a strong chain?

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Havana Junior High Science Club

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  1. The Weakest Link Can your team build the longest chain that holds the most weight? Havana Junior High Science Club

  2. Questions to consider .... What is a chain? What makes a good chain? How can your the materials provided to make a strong chain? Will it matter where the weights are placed? How will you hold on to it during testing?

  3. Materials Provided 15 straws 10 craft sticks 5 index cards 25 pipe cleaners 200 cm of string 10 rubber bands 200 cm of masking tape Teams may also use scissors and rulers. Competition Rules: Each team will be provided with a junk box filled with materials to build a chain. Each team will receive only one set of materials! Teams may use all or part of the materials provided and are not allowed to share materials with other teams. Scissors will be provided. Teams will be allowed time to build and test their chain. Competitors are allowed to bring diagrams to help them build the chains. After the time is up, all structures will be impounded and no changes will be allowed!

  4. Requirements: Teams must hold onto each end of the chain during testing and cannot provide additional support to any other part of the chain. The ends of the chains must be located at a height of 1 meter from the floor. Teams will be required to select anchor points for each of the weights prior to the testing process. Anchor points cannot be located on the links at each end of the chain and cannot be adjusted during the testing process after the first weight is attached.

  5. Testing Procedure: At testing time, team members will be asked to identify the five anchor points for each of the five testing weights. Testing will begin with the lightest object. If that object is held successfully, the remaining objects will be added following the same procedure - lightest to heaviest. Teams will be required to wait 30 seconds before adding another weight. Testing will be done when the chain or testing weight touches the floor, the chain breaks apart, or the chain holds all the weights. Points will be awarded for length as well as each weight that is held successfully. The chain that earns the most points will be declared the winner! In case of a tie, the lightest chain will be the winner. Think About It Take 10 minutes to discuss the project with your teammates. Complete the worksheet and show it to Mrs. Trimpe or Mrs. McDaniel to receive your materials. You may begin to build your chain after you receive your materials!

  6. You will have 30 minutes to design, build, and test your chain. After the time is up, all chains will be impounded and the competition will begin. Online Stopwatch Questions?

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