I
have just completed the radio-chemistry unit with my Tech Chem
students. Bearing in mind that most students knowledge of radiation is
from misinformed popular journalism, Hollywood (I wouldn't even give
them the description of misinformed for the baloney they serve up), and
video games, this unit is usually the first time they have been
introduced to the facts concerning nuclear power, radiation
and risk. Risk is a particularly tricky one for teenagers, in a world
where it is either right or wrong most teenagers find it very difficult
to assess and understand risk. This unit introduces all aspects of
radioactivity to the students; its natural existence; the use of nuclear
power, how it works and the risks and challenges it presents; elemental
transmutation and how the elements are constructed; the different kinds
of radioactivity their discovery and their detection; nuclear fission
and fusion and its uses for good and not so good. This latter part
involves the examination of the Hiroshima and Nagasaki bombings (I use
the movie "White Light Black Rain" for this); examination of the
Chernobyl disaster and the Three Mile Island incident along with the
movie "China Syndrome and the effects these had on the American
perception of nuclear power and its risks. Students work on Radioactive
Decay charts and chains and using problem solving strategies to predict
products, precursors and radioactive emissions and to round off the unit
we watch a portrayal of the investigation of the Chernobyl disaster,
following all of this as a tying up the loose ends exercise we use this
piece as a little bit of a brain stretcher to get the less
reading/writing orientated students to use and develop their expository
skills. It usually starts with howls of protest but they calm down
relatively quickly when they realize that the information is all there
for them and all they really have to do is to extract it and define it.





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