Today we are going to talk about two types of radiation:
High level radiation - major doses of radiation; and
Low level radiation - smaller doses of radiation that are
present in our daily lives.
This video that explains one type of radiation that affects us on earth:
http://science.discovery.com/videos/100-greatest-discoveries-shorts-cosmic-radiation.html
Please read this article about electromagnetic magnetic radiation for more information:
http://www.teachersdomain.org/resource/phy03.sci.phys.energy.radsource/
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