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Description

LEAK PROOF BAGS

Resources

 Zip- lock bags
 Pencils
 Water

Instructions

1. Fill a zip lock bag about 2/3 full of water.
2. Re zip
3. Carefully, poke a sharp pencil right through the water and out the other end.
4. No water spills!


How does this experiment work?
 So, what's the secret?
 Zip-lock bags, like other plastics, are made from polymers--long chains of molecules
 When you poke through the bag, you force the polymers apart
 But they quickly press back as much as possible
 As they press towards the pencil, they practically seal the hole you made.
When you're done, hold the bag over the sink and pull the pencils out. These "fountains" are just as exciting as the leak proof bag!!

Acknowledgement/Source
https://www.stevespanglerscience.com/lab/experiments/leak-proof-bag/
Attachments/Template needed for activity? No

Tags

• IGG Interest Badge
• Ladybird Interest Badge
• Ladybird STEM
• Leak Proof Bag
• South West Regional Conference 2018

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