One of the "Try This" projects in our Apologia Anatomy & Physiology text was comparing an egg to a brain.
The kids dropped two raw eggs into a plastic container and then went crazy, running and shaking, then finally dropping them onto the pavement!
It didn't take long for the "brain" to succumb to such abuse:
We repeated the experiment after adding a new egg and water to the top of the container, acting as the skull and surrounding fluid to cushion any blows. (No pictures of the result -- my camera battery died! -- but the eggs came out just fine this time.)
I love this! going to try it with my kids, even though we don't homeschool
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