Tuesday, March 1, 2011
Plate Tectonics: Candy Bar Faults
Demonstrate tension by pulling (slowly and only a small amount) on the two ends of the candy bar. Notice how some of the asthenosphere is revealed.
To demonstrate shearing (strike-slip faults), push the two sides of the candy bar back together. Then slide one half forward while pushing the other one back.
Finally, to demonstrate compression forces, push the two ends of the candy bar together. You'll see the pieces of chocolate crust colliding and maybe even sliding over each other, creating mountains.