The Chemistry students went over the basic design of an atomic weapon and we also learned about a nuclear chain reaction. It is super important that you understand what happens in a nuclear chain reaction.
This site might help: https://www.youtube.com/watch?v=Su582xV_WzA
This one as well: http://blog.nuclearsecrecy.com/misc/criticality/
The AP Biology students continued their review of the Hardy-Weinberg Principle, allopatric speciation and genetic drift. You don't know these things??!!?? You better hit the books! We got an exam tomorrow!