Radioactive Isotopes Are Used in Dating Materials from the Distant $\pm$

question 2

Multiple Choice

Radioactive isotopes are used in dating materials from the distant past.Which of the following statements about radioactive dating techniques is true?

• A)It gives the general ages of rock strata.(\(\pm\)1 million years).
• B)It gives exact ages of rock strata.(\(\pm\) 1 year).
• C)It uses a technique in which the degree of radioactive decay is measured, the younger the rock the more radioactive decay.
• D)It uses a technique in which the degree of radioactive decay is measured, the older the rock the more radioactive decay.

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Definitions:

Endergonic

Describes a chemical reaction that requires energy to be absorbed from its surroundings, not occurring spontaneously.

Open System

An entity that exchanges energy with its surroundings. Compare with closed system.

Energy Content

The total amount of energy available in a food item or fuel source, typically measured in calories or joules.

Organism

Any living system consisting of one or more cells.