Use this paragraph: The half-life of carbon-14 is 5,700 years. A certain sample of wood has 20 grams of carbon-14 when it is alive.

Question

How many grams of carbon will it have after 5,700 years?

(1 point)
Responses

2 grams
2 grams

40 grams
40 grams

5 grams
5 grams

10 grams

Answer 1

After 5,700 years, which is one half-life of carbon-14, the amount of carbon-14 remaining in the sample would be half of the original amount.

Since the sample has 20 grams of carbon-14 when it is alive, after 5,700 years, it would have:

20 grams / 2 = 10 grams

So, the correct response is:

10 grams