Combine Engineer's Week activities and ZOOM (Z- double O -M).
We choose the activity Polishing Pennies .
We used four different liquids to polish our pennies:
While were waiting patiently (yeah right!) for the pennies to soak, we decided to see what happens when you mix Baking Soda (a base) with Vinegar (an Acid).
Mom moved the lab to the Kitchen Sink for this part.
The foam felt funny!
We returned to cleaning the pennies.
And the winning Penny Polisher was ---- LEMON JUICE!!