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[Channel-talkchemistry] Reactions in chemistry workshop #3 post 2

From: Joe Lannan <jlannan@esu3.org>
Date: Wed Oct 27 2004 - 10:12:59 EDT

It is important to have students do science in the lab and hands on
activities. In addition it is important to make the activities relevant to
the students every day life. The focus in this video is on energy and
several activities dealt with nuclear energy. This topic will become more
important as the oil and coal resources are depleted and other energy source
explored. In light of this it is important that high school students need
to be exposed to nuclear chemistry. The M&M activity was a simple and
effective way of explaining the concept of half life. Ms. Berryıs hands on
nuclear chemistry activity was very powerful. The students determined the
relationship between intensity and distance and what different materials
shield different types of radioactive decay. There where a lot of good
discussions related to the safe use of nuclear power. I think this activity
help reduce the fear of nuclear power by increasing the students knowledge
and understanding.
As a homework assignment I researched solar and nuclear energy. Solar
energy consist of photovoltaic cells and passive solar heating and cooling.
The initial cost are high and not all locations in the US could benefit.
Nuclear energy is a more controversial topic. The public tend to have a
negative view of that source of energy. Accidents at three mile island and
Chernobyl has place nuclear power as possible an unsafe source pf energy.
Using U-235 in a fission reactor in the US supplies about 20% of electricity
used. In Europe, Russia and Japan that % is higher. Though there are
problems associated with building, running and storage of the waste with
nuclear power plants, nuclear is still a very good option as an alternate
energy source. Our students will have to face these issues in the future
and by exposing them to nuclear chemistry in high school they will be able
to make informed decision on their future

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Received on Wed Oct 27 12:13:24 2004

 
 

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