Which allowed scientists to determine that Earth was at least 4.3 billion years old?(1 point)
Responses
the electrical conductivity of uranium ions
the electrical conductivity of uranium ions
chemical reactivity of zircon ions
chemical reactivity of zircon ions
the radioactive decay of uranium to lead
the radioactive decay of uranium to lead
magnetic field surrounding zircon
the radioactive decay of uranium to lead
The correct answer is:
- The radioactive decay of uranium to lead.