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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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bgzhoumi bgzhoumi
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6 years ago
In the last 20 years geologists have begun measuring accumulation of Helium (He) in some minerals because these minerals can retain He at temperatures up 100-200C.
 
  The date gives a time when the material cooled below the temperature where the helium began to be retained, which is related to the depth of the material. Where do you think the He comes from that allows this technique to work?
  A) alpha decay of some radioactive element B) beta decay of some radioactive element
  C) the sun D) the atmosphere, like carbon-14
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WilkinsonWilkinson
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6 years ago
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bgzhoumi Author
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6 years ago
Thanks
jodie1
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Yesterday
Just got PERFECT on my quiz
asd454512
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2 hours ago
You make an excellent tutor!
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