Question

Which is correct about the effectiveness of carbon dating? (1 point)
Responses

It only works for organisms that died less than about 60,000 years ago.
It only works for organisms that died less than about 60,000 years ago.

It only works for rocks that formed more than about 6,000 years ago.
It only works for rocks that formed more than about 6,000 years ago.

It only works for organisms that died less than about 6,000 years ago.
It only works for organisms that died less than about 6,000 years ago.

It only works for rocks that formed more than about 60,000 years ago.

Answer 1

It only works for organisms that died less than about 60,000 years ago.

Explanation: Radiocarbon (C-14) dating applies to once-living organic material and is effective to roughly 40–60 thousand years (C-14 half-life ≈ 5,730 years); after that too little C-14 remains to measure reliably. It is not used to date most rocks.