Which allowed scientists to determine that Earth was at least 4.3 billion years old?(1 point)
Responses
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
magnetic field surrounding zircon
the electrical conductivity of uranium ions
the radioactive decay of uranium to lead
The composition of moon rocks and some Earth rocks are similar
4.6 billion years ago
Its hydrogen atoms are heavier than others.
Earth's surface is constantly changing.
B I think
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b
Duplicating the answers are a lot of extra work as well as annoying.