Download Chapter 4: Conceptual Science Teaching

72.
Scrambled Eggs
Link with curriculum: Grade 8, chapter 1, lesson 3 (2010) & Grade 8, chapter 2, lesson 1 (2010)
Explanation
This cartoon deals with the nature of a pure element (a pure substance containing only one type of
atom), a compound (two or more substances combined) and a mixture (two or more elements or
compounds mixed together). Confusion is quite likely because eggs are not made from a single pure
substance. Eggs are made up of a complex mixture of compounds which are changed chemically
during heating. You can review the definitions of elements, compounds and mixtures and let students
find out more about the chemical makeup of eggs and to look at how the white and yolk are each
affected separately by heat. This cartoon can be combined with a card sorts activity or a concept test
to deepen studentsҋ understanding.
Student Centred Approaches for Science Education – Part 2
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