Bernstein and Wong (1977) have presented an excellent earth science lesson by using the cross-section of a hard-boiled egg. The yolk, white and shell, respectively; represent a model of the earth's core, mantle and crust.
Iowa Science Teachers Journal
© Copyright 1984 by the Iowa Academy of Science
Schwartz, M. L.
"Using an Egg to Understand the Three Types of Rocks,"
Iowa Science Teachers Journal: Vol. 21
, Article 6.
Available at: https://scholarworks.uni.edu/istj/vol21/iss2/6