Leave the egg out of another. Leave the baking powder out of the third. Cut each cake in half and look at the insides. Write about, or draw pictures of, what you see and taste. It causes protein from the egg to change and make the cake firm.
Oil keeps the heat from drying out the cake.
Concepts The National Center for Improving Science Education recommends that elementary schools design curricula that introduce nine scientific concepts. A Blueprint for Elementary School Science Education. Scientists have made the study of science manageable by organizing and classifying natural phenomena. Primary grade children can be introduced to this concept by sorting objects like leaves, shells, or rocks according to their characteristics. Intermediate grade children can classify vegetables or fruits according to properties they observe in them, and then compare their own classification schemes to those used by scientists.