human
Question: Geologists frequently use mass spectrometers in determining the relative age of rocks. A spectrometer can differentiate between the ratios of isotopes in rock samples and calculates the radioactive decay involving what two isotopes?

Choices:
A) Uranium - Lead
B) Rubidium - Strontium
C) Potassium - Argon
D) Uranium - Strontium
gpt
The correct answer is 0: Uranium - Lead.