Chemfest 2007

On Sunday, we attended Chemfest at Boonshoft.

On our way there, we passed the Weinermobile!

Once at Boonshoft, the girls each received a passport that got stamped after completing an activity.

The girls experimented with soap's effect on grease. They also tried cleaning a grease stain with just water, and saw the difference.

You can find out how soap works by visiting http://www.worldofmolecules.com/interactive_molecules/soap.htm

They also made some lip balm.

The girls experimented with liquid density. They used soap, water, and shampoo and a marble to demonstrate which one is more dense. They found out by dropping a marble into a tube filled with one of the solutions and timing it's decent. The shampoo won; it had the slowest time.

They made some paint impressions of fish.

And extracted the beta carotene from carrots.

They experimented with mixing colors.

And saw how to seperate colors.

The girls learned about surface tension and dissolving.

And tested for acids, bases, or neutrals.

Georgia's hypothesis was correct, Sprite is an acid. It turned red when she added the purple cabbage juice.

Olivia found out that Amonia is a base. It turned blue.

Vinegar is an acid. Then Georgia added some baking soda to it. Bakind soda is a powdered base. The acidity in the vinegar turned to neutral.

We saw how good, or not so good, we washed our hands with a special lotion that shows GERMS on your hands when placed under a black light.

And they made some paintings and changed the colors using different chemicals.