Liquids and solids

We had 2 eggs in the classroom, one hard boiled, the other raw. I told the class, I wanted to enjoy the cooked one on my lunch, but could not recall which one was which. Each student had the opportunity to touch, roll, smell, listen to, and pick up the 2 eggs in an effort to figure out which was which. Accordingly, they made a prediction.

We discussed th consistency of a raw egg and the cooked egg, introducing the concept of liquids and solids. We then had to simulate a raw egg and cooked egg by using the plastic Easter eggs. In one we filled it with water and a small ball, the other, we tried to fill full of sand. When we tried to spin each egg we discovered that the sand filled one rotated quickly and for a long time. The one filled with water "sloshed" around and didn't rotate well.

We transferred this knowledge to the real eggs, concluding that the cooked egg was a solid, and the raw egg was a liquid. Once we spun the real eggs, we were quickly able to tell which was which!