Sunday, March 30, 2008

Here is one of the Parts of an Egg books made by many of the children in the class. The first four pages of the book have the individual egg parts pasted in and labeled. This shows the final, completed egg. Each part is again pasted in, one on top of the other. On the last page, this child chose to write her thoughts on eggs. Before presenting this activity, Mrs. T. gave each child a hard boiled egg. Each peeled off their egg's shell, then the membrane, then the albumen and then reached the yolk. The final act in thsi exploration? Eating the egg!
Next, we took our scientific inquisitiveness further by putting a raw egg into vinegar for a few days last week. The acidic vinegar immediately began dissolving the calcium in the shell. This was obvious by all the tiny bubbles of gas covering the egg. By Friday, soft flaps of shell were peeling off the membrane. Upon washing off the rest of the now soft shell, the children got to hold the shelless egg and see the albumen and yolk through the transparant membrane. It was exciting.

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