Leak proof bag

• Several round pencils
• 1 plastic zip-top bag
• Water

STEP 1: Fill a plastic zip-top bag about three quarters of the way with water.

STEP 2: Stick a sharp round pencil through the bag.

Explanation

The zip-top bag is made out of polymers. Polymers are long chains of molecules and when the sharp pencil is pushed through the bag these molecules seal up around the pencil, which prevents the water from gushing out of the bag.

KFVS12 and the Southeast Missourian are teaming up for science. Every Tuesday, you'll find an experiment from the KFVS Heartland Science Lab in the Class of 2morrow section of the Southeast Missourian. Grab the ingredients and join KFVS science reporter Jason Lindsey live on KFVS at 5 p.m. every Wednesday. More science experiences can be found at www.kfvs12.com and www.semissourian.com.