Report Copyright Infringement View in OSM UK

Description

LEAK PROOF BAGS

Resources

Zip-lock bags
Pencils
Water

Instructions

Aim of Badge
To discover STEM (Science, Technology, Engineering and Maths) in an easy and fun way through simple experiments and activities.

This Badge has 12 options of which 5 must be completed
(1 Leader Demonstration Option and 4 Ladybird Options)

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

• Branch Weekend 2018
• interest badge
• Interest Badge Ladybird STEM
• Ladybird STEM
• Leak Proof Bag
• Trefoil News Summer 2018

Badge Links

This activity doesn't complete any badge requirements