Answer:
Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in <em><u>igneous</u></em> rock. The radioactive, or <u><em>unstable</em></u> elements decay into nonradioactive elements. Because this rate of decay is <em><u>constant
</u></em> for each element, geologists can compare the amounts of stable and unstable elements to determine how much of the <em><u>stable</u></em><em> </em>elements have formed over time.
Explanation:
The method used by geologists in calculating the precise or absolute age of a fossil is called radiometric dating. This calculation is done by measuring the amount of energy emitted by some radioactive elements present in the igneous rocks.
<u>Each element with radioactive properties has a constant decay rate</u> of its radiation, which is the amount of radioactivity that it loses over time. After the necessary time, the radioactive or unstable elements become stable particles.
Since each element has a constant decay rate, the time that has elapsed since its formation can be estimated.
Although fossils are normally found in sedimentary rock strata -which do not contain radioactive elements- their precise age is calculated using radiometric dating of adjacent igneous rock strata.
Learn more:
Radiometric dating brainly.com/question/2833014
