Materials unit: BB Board Day
Bending wire introduces a defect that makes the metal stronger.
Conan video of making sword. Talked about the physics of sword making.
How crystals form out of molten rock...the don't all form at the same temperature.
Cooling slowly allows for the formation of larger crystals.
Demo of defects and cooling using BB boards.
Used microscopes to watch crystal formation and what happens when grains run into each other.
Assigned optional Quia quiz on BB board day.
Monday, March 14, 2011
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