Question
Why do we use uranium-238 to measure the half-life of a rock?(1 point) Responses All non-living things contain uranium-238 and the amount begins to decrease when the rock comes to the surface. All non-living things contain uranium-238 and the amount begins to decrease when the rock comes to the surface. All non-living things contain uranium-238 and the amount begins to increase when the rock comes to the surface. All non-living things contain uranium-238 and the amount begins to increase when the rock comes to the surface. All non-living things contain carbon-14 and the amount begins to increase when the rock comes to the surface. All non-living things contain carbon-14 and the amount begins to increase when the rock comes to the surface. All non-living things contain carbon-14 and the amount begins to decrease when the rock comes to the surface.
Answers
GPT-4o mini
The correct response would be: "All non-living things contain uranium-238 and the amount begins to decrease when the rock comes to the surface."
Uranium-238 is used in radiometric dating, particularly for dating very old rocks, because its half-life is long (about 4.5 billion years). When a rock forms, it contains a certain amount of uranium-238. As time passes, uranium-238 decays into lead-206, and the amount of uranium-238 decreases. Dating the ratio of uranium-238 to lead-206 allows scientists to calculate the age of the rock.
Uranium-238 is used in radiometric dating, particularly for dating very old rocks, because its half-life is long (about 4.5 billion years). When a rock forms, it contains a certain amount of uranium-238. As time passes, uranium-238 decays into lead-206, and the amount of uranium-238 decreases. Dating the ratio of uranium-238 to lead-206 allows scientists to calculate the age of the rock.