Why is it necessary to have a standard for the interpretation of stable isotope ratios?
A) A standard is necessary to calculate how much radioactivity was added to a sample.
B) A standard is necessary to determine the stable isotope ratio in the absence of biological activity.
C) A standard is necessary to determine the weight of each isotopes.
D) A standard is necessary to determine the age of the sample.

Question

Quizplus · Accepted Answer

A standard for the interpretation of stable isotope ratios is necessary to determine the stable isotope ratio in the absence of biological activity. This is important in fields such as geology, where isotopic analysis is used to study the age, past environments, and geological processes. The standard provides a reference point for interpreting the ratios found in a sample. It is not related to radioactivity, the weight of the isotopes or the age determination of the sample, so options A, C, and D can be eliminated.

Why Is It Necessary to Have a Standard for the Interpretation