You probably wouldn’t believe me it I told you we could fill a bag with water and then poke holes in it and the water wouldn’t leak out. But you’d be wrong, because that is exactly what we are going to do.
Prepare to be amazed at the experiment and then grab a plastic baggie and pencil and try it yourself!
Why Doesn’t the Water Leak Science Experiment Video
- Plastic Baggie
- Sharpened Pencils
Step 1 – Fill a plastic baggie a little over 1/2 way full of water.
Step 2 – Seal the baggie.
Step 3 – Quickly stab a sharpened pencil through the baggie.
Step 4 – Try stabbing multiple pencils through the baggie. Why doesn’t the water leak?
How Does the Experiment Work?
The plastic baggie is made from polymers (long chains of molecules). When you stab a pencil through the bag, the polymers move apart but then the flexibility of the polymers push back toward the pencil and form a temporary seal. This prevents the water from leaking out of the holes.
Looking for a more detailed scientific explanation of polymers? Visit Steve Spangler Science
I hope you enjoyed the experiment. Here’s some printable instructions