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Radioactivity is found in naturally occurring sources and in artificially produced ones. People are constantly being exposed to radiation from a variety of natural and human-created sources. Exposure should be minimized, but it can never be reduced to zero.
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library.thinkquest.org/27948/radioactivity.html
library.thinkquest.org/27948/radioactivity.html
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Although natural concentrations of these radioactive materials are usually less than established threshold health values, human activity often inadvertently exposes us to radionuclides at dangerous levels.
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energy.usgs.gov/factsheets/Radioactivity/radioact.html
energy.usgs.gov/factsheets/Radioactivity/radioact.html
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Radiation is a natural part of the earth's environment. ... Natural radioactive material in rocks and soil account for about 28 millirem or 8% of the radiation dose a person typically receives in a year from all sources (including medical exposures). ... Glossary | Natural Radioactivity | NORM | Radon...
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www.hps1.org/glossary/natural.htm
www.hps1.org/glossary/natural.htm
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Background radiation - Wikipedia, the free encyclopedia
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Background radiation is constantly present in the environment and is emitted from a variety of natural and artificial sources. Primary contributions come from: • Sources in the earth. These include s...
en.wikipedia.org/wiki/Background_radiation
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1. Explain what is meant by radioactivity and natural radioactivity. 2. Describe the types of nuclear radiation with respect to their mass, penetrating power, ionizing ability, nature and speed. 3. Demonstrate how to detect radioactivity;
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www.scienceteacherprogram.org/physics/Garcia00.html
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Core Unit IV: Nuclear Physics ; A. Natural Radioactivity ... People are constantly being exposed to radiation from a variety of natural and human-created sources. Exposure should be minimized, but it can never be reduced to zero. ... Realize that radioactivity is found in both natural and artificial sources.
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www.sasked.gov.sk.ca/docs/physics/u4a3phy.html
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Definition of Natural radioactivity in the Medical Dictionary. Natural radioactivity explanation. Information about Natural radioactivity in Free online English dictionary. What is Natural radioactivity? Meaning of Natural radioactivity medical term. ... Natural radioactivity; natural selection;
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medical-dictionary.thefreedictionary.com/Natural+radioa...
medical-dictionary.thefreedictionary.com/Natural+radioactivity
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Radioactivity is common in the rocks and soil that makes up our planet, in the water and oceans, and even in our building materials and homes. It is just everywhere. There is no where on Earth that you can get away from Natural Radioactivity.
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www.umich.edu/~radinfo/introduction/natural.htm
www.umich.edu/~radinfo/introduction/natural.htm
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References: Experimental detection of a–particles from the radioactive decay of natural bismuth; Pierre de Marcillac, Noël Coron, Gérard Dambier, Jacques Leblanc & Jean-Pierre Moalic. Nature, April 24, 2003. For more information: http://www.ias.fr;
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www.cnrs.fr/cw/en/pres/compress/bismuth.htm
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