Question

Determine the age of rock #4. Should you use Carbon-14 or Uranium-238 and why?(1 point) Responses 700-750 Million Years; Carbon-14; because rock is a living stone 700-750 Million Years; Carbon-14; because rock is a living stone 1,000-1,040 years; Uranium-238; because wood was once living 1,000-1,040 years; Uranium-238; because wood was once living 1,000-1,040 years; Carbon-14; because wood was once living 1,000-1,040 years; Carbon-14; because wood was once living 700-750 Million Years; Uranium-238; because rock is non-living

Answer 1

To determine the age of rock #4, you would use Uranium-238 rather than Carbon-14. The reasoning is as follows:

1. Uranium-238 is typically used for dating geological samples that are millions to billions of years old. It is suitable for dating igneous and metamorphic rocks since it has a very long half-life (about 4.5 billion years).

2. Carbon-14 is only effective for dating relatively younger organic material, up to about 50,000 years, because it has a much shorter half-life (about 5,730 years).

Given the context that rock #4 is estimated to be in the age range of 700-750 million years, Carbon-14 would not be appropriate for dating this rock since it falls far outside the range of what Carbon-14 can effectively date.

Therefore, the correct response would be:

700-750 Million Years; Uranium-238; because rock is non-living.