Leak Proof Zip Lock Bag Easy Science Experiment For Kids

 Overview 

This science experiment the Leak Proof Bag is a cool activity for kids. When the pencil pierces through the zip lock bag full of water the water does not run out. All you need is just two household supplies a zip lock bag and pencils Kids will be screaming with fear by this awesome science project.

Age: 8+        Time: < 30mins

 Safety 

1. Do it far away from electricity.
2. Be careful with sharp objects.
3. Operate above the tray.

 Materials List 

• Zip lock bag
• Sharpened pencils (sharpened bamboo sticks are also available)
• Water

 Instruction 

Step 1/2 – Add water to the Zip lock bag about 2/3 full and seal the bag.

Step 2/2 – Lift the bag and pierce the bag with a sharpened pencil.

 Troubleshooting 

Why is my bag leaking?

- Maybe the bag material is not elastic. It is recommended to use the PE bag.

 Question to Ask 

1. Can you replace the bag with other kinds?
2. Why is the bag not leaking?
3. When the bag is placed on the tray after piercing, will it leak?

 Scientific Description  

The zip-lock bag used in this experiment is made of long-chain polymer, similar to balloons and rubber. These long-chain polymers have a character of elasticity. When the pencil pierces the zip-lock bag, due to the elasticity of the zip-lock bag and the water pressure upon the zip-lock bag, the long-chain polymer around the hole made by pencil can still closely surround the pencil without a gap so that the water will not leak out.

 Extensions 

How many pencils you can be pierced in?