Subject: How do we know how much radioactive isotope is in fresh volcanic rock?
Date: Mon Oct 4 23:45:29 1999
Posted by Matt
Grade level: 7-9
City: Arnold State/Province: Missouri
Area of science: Earth Sciences
The formula for radioactive isotope decay requires that you know the
initial percentage of isotope in a little piece of rock.
But was the initial percentage is the same 25 billion-zillion years ago as
it is today? Is radioactive stuff magically created within the earth
before a volcano barfs it up? And does it decay inside the earth? HOW DO
Re: How do we know how much radioactive isotope is in fresh volcanic rock?
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