Earth's Formation Quick Check
1 of 51 of 5 Items
Question
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
magnetic field surrounding zircon
magnetic field surrounding zircon
the radioactive decay of uranium to lead