Question

Which statement is true about radiocarbon dating?

A. After it dies, an organisms body continues to intake C-14.

B. Radiocarbon dating is useful for dating objects up to 100,000 years old.

C. Radiocarbon dating assumes that half-life for radiosotopes change over time.

D. The half-life of C-14 is 5,730 years.

Answer 1

the correct answer is c, c-14 has a half-life of 5, 730 years

Answer 2

D. The half-life of C-14 is 5,730 years.

Step-by-step explanation:

Radiocarbon dating is method used to determine the age of an animal or object which contains organic material. This can be done thanks to the properties of radiocarbon. Basically, it's a method to measure residual radioactivity, that means after the animal dies it stops exchanging carbon.

Now, one of the most common isotope is Carbon-14. Actually it's used so often that the radiocarbon dating is also called Carbon-14 dating. One of the characteristic of this isotope is that it has a half-life of 5,730 years. This means after an organism has been dead for 50,000 years, there's no enough isotopes to do the test with Carbon-14.

Therefore, the right answer is D.