SCIENCE WITH MR. G!

Today our favorite scientist in a white lab coat came for a visit!  Mr. G helped us review the scientific method and then conduct an experiment with our classmates.

Here's the PROBLEM:
What will happen if you combine baking soda, vinegar, and water in a sealed zip lock bag?

Here's the PROCEDURE:
1. Pour 1/2 cup of water and 1/2 cup of vinegar into a zip lock bag.
2. Pour one teaspoon baking soda onto the middle of a square of toilet paper.
3. Create  bundle of baking soda with the toilet paper and twist the top.
4. Seal the zip lock back part way.
5. Drop the baking soda bundle into the bag and seal the zip lock the rest of the way.
6. Sit back and observe.

Here's the MATERIALS:
zip lock      water      vinegar      baking soda      measuring cup      teaspoon      plate      toilet paper

Here's our HYPOTHESES:
12 kids thought the liquid in the bag would change color.
3 kids thought the bag would blow up like a balloon.
2 kids thought the bag would blow up like a balloon and pop.
0 kids thought the bag would melt.

Here's the RESULTS:

The bag blew up like a balloon and popped!  The vinegar and baking soda created a chemical reaction that caused the creation of carbon dioxide.  The carbon dioxide filled up the zip lock and needed a place to go, so it popped open the top of the zip lock bag!  Pretty exciting stuff.