Secret Formula: Testing Cleaning Ability

Well, after you have tested toothpaste ingredients for texture, suds and taste, the last test for toothpaste ingredients is a test for cleaning ability. 

In advance stain some tiles (the kind you use in bathrooms) with some blueberry syrup and then use the different materials you had in the last session to test how well they clean the stains and have your student record his results.

Now that he has all the test results in for texture, suds, taste and cleaning ability, the next time he can decide how much of each ingredient to add to their own toothpaste formulas.


Related Posts:
Secret Formulas: Paste
Secret Formulas: Cola Taste Test
Secret Formulas: How Sweet IS Coke?
Secret Formulas: To Each His Own Cola
Secret Formulas: Ice Cream
Secret Formulas: Toothpaste

Source:
GEMS Guide Secret Formulas Grades 1–3
Students eagerly investigate the properties of substances as they make their own personal brands of paste, toothpaste, cola, and ice cream. The activities have been designed to convey key science/mathematics skills and concepts, provide motivating real-life experiences with chemistry, and build comprehension of cause and effect, central to later understanding of controlled experimentation. Secret Formulas speaks to the need expressed by many primary school teachers for more high-quality physical science activities.