Secret Formula: Testing Cleaning Ability

Well, we have tested our toothpaste ingredients for texture, suds and taste. The last test for toothpaste ingredients was a test for cleaning ability. We stained some tiles (the kind you use in bathrooms) with some blueberry syrup and then used the different materials to test how well they cleaned the stains. They all cleaned well but soap and calcium carbonate tied for first place, with baking soda and salt in second place.

Now that they have all the test results in for texture, suds, taste and cleaning ability, the next time we meet they can decide how much of each ingredient to add to their own toothpaste formulas. And for those of you who have asked, yes, we will cover adding flavors next time, too.




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.

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