Wednesday, February 23, 2011

Eager to "Egg"speriment

Over the past week, our class has been learning about dental health. I love teaching this subject by using the famous “egg”speriment. We discussed how eggs are a model for our teeth (hard enamel on the outside; soft dentin on the inside). 

Students felt the hard-boiled egg’s shell. Using Cara Carroll’s “Brusha, Brusha, Brusha Enamel 'Egg'speriment" pages, we wrote the question: “What will happen if we don’t brush our teeth?” Students then made a hypothesis. We placed the egg inside of jar of vinegar for 2 days.

Today we took the egg out of the vinegar and students were able to feel how the shell had been eaten away by the acid. The students were amazed, shocked, and excitedly wrote down their observations. 

This year a colleague of mine introduced a twist to the experiment. For the past four days, we have been soaking an egg in fluoride toothpaste. Tomorrow we are going to place this egg inside a jar of vinegar. 

Students will go through the scientific process again by asking a question (Does brushing our teeth keep our enamel strong?), make a hypothesis, note observations, and come to a conclusion. 


Anonymous said...

First I have to tell you I love your TpT activities and your blog! Too cute! I teacher kindergarten, and we did a very similar activity this past February. We soaked our eggs in cups filled with Pepsi. Each student had one. We let them sit all day, and at the end of the day the egg shells had turned brown. We took toothpaste and tooth brushes (bought from the dollar tree), and were able to brush the eggs back to their original white color! It amazes me every time! :o)

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