Editing Earthquake Cake (section)

== Demonstration ==

;Preparation:
Create the Cakes: Either bake three cakes according to the directions given with the recipes, or purchase three cakes. If purchasing them, try to purchase them without icing. Slice the first cake down the center, and then ice it to hide the cut. Slice the second and third cakes down the center at an angle, and then ice them to hide the cuts. Be sure to label each cake with colored icing, labeling the first as "Strike/Slip", the second as "Normal" and the third as "Thrust".
;Presentation:
# Show students the "Stirke/Slip" cake, and ask for ideas on what kind of motion this will be. Put a spatula under each side of the cake, and slowly slide one side of the cake towards you as you push the other side away. What do the students see happening to the icing on the surface?
# Show the "Normal" cake, and ask for ideas on the type of motion this could be. Put both spatulas under one side of the cake, and slowly pull it away from the other side. What happens to the icing this time?
# Show the "Thrust" cake, and ask for ideas on the type of motion this could be. Put both spatulas under one side of the cake, and slowly lift it while sliding it towards the other side of the cake. What happens to the icing on the surface this time?
# Finish by serving a slice of cake to each student! Only cut small pieces for the students, and cut the slices perpendicular to the fault lines in the cakes. That way, you can still show the types of earthquakes to other students as you serve out the cakes.