Poke the Bag
By : Ethan Lichtblau, Drew Obernesser, Rohan Nair, and Tony Wang
By : Ethan Lichtblau, Drew Obernesser, Rohan Nair, and Tony Wang
The Poke the Bag experiment is a fun and enjoyable experience, showing how the plastics that make up a plastic bag, even when cut threw with a pencil, can contain a liquid without spilling.
List of Materials:
A Ziploc Bag
Water, or any fluid of your choice!
Pencils
Remember, pencils can be very sharp, you don't want to poke yourself! Always can make to hold the pencil by the side of the eraser, and don't point the sharp side at anyone!
Fill the Ziploc bag ¾ full of water.
Then Zip it closed.
Hold a pencil in one hand and poke the pencil all the way through the Ziploc bag - have the pencil go in one side and come all the way out the other side.
Repeat with more pencils.
Have fun!
No water spills out of the holes because Ziploc bags are made of polymer. When you poke the sharp pencil into the plastic the pencil point slides in between the chain of molecules that make up the polymer. The molecule chains "hug" the pencil, making a seal around the pencil that won't let the water out. Polymer chains work together to prevent water from leaking out of a bag.
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