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applegatedogs applegatedogs
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6 years ago

__________________, an isotope commonly used to date organic material, is formed from the conversion of nitrogen-
  14 by cosmic rays. Fill in the blank(s) with the appropriate word(s).

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icysparklesicysparkles
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applegatedogs Author
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6 years ago
This calls for a celebration Person Raising Both Hands in Celebration
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Yesterday
Good timing, thanks!
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2 hours ago
Smart ... Thanks!
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