Which allowed scientists to determine that Earth was at least 4.3 billion years old?(1 point)

Question

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

Answer 1

b
Duplicating the answers are a lot of extra work as well as annoying.

Answer 2

B I think

Answer 3

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.

Answer 4

B

Answer 5

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Answer 6

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Answer 7

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