Chicken Eggs

by: Page Keeley and Joyce Tugel

The purpose of this assessment probe is to elicit students' ideas about food, transformation of matter, growth and development, conservation of mass, and systems. The concepts underlying this probe are complex. It is not important that students know exactly what happens to the mass of an egg and why. Rather, this probe is used as an interesting context to draw out their ideas about several interrelated concepts in science.

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