Why Is It Necessary to Have a Standard for the Interpretation

question 4

Multiple Choice

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.

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Definitions:

Mercury

A chemical element (symbol Hg) that is a heavy, silvery d-block element known for being the only metallic element that is liquid at standard conditions for temperature and pressure.

Motor Milestones

Developmental achievements relating to a child's physical ability to move and manipulate their environment, including crawling and walking.

Sitting Up

The physical milestone in infant development where a baby can hold up their head and maintain an upright posture without support.

Rolling Over

A developmental milestone in infants, referring to the ability to turn the body from its back to its abdomen or vice versa, indicating progress in motor skills.