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