Question 3 (4 points) Match the following terms with their definition. Column A Column B 1. isotope a. an atom of an element with a different number of neutrons 2. half life b. the procedure of calculating the absolute ages of rocks and minerals that contain radioactive isotopes radiometric dating c. a process used to arrange geological events, and the rocks they leave behind, in a sequence. The method of reading the order is called stratigraphy (layers of rock are called strata). 4. relative dating d. the amount of time it takes for half of the radioactive isotopes in a sample to change into another isotope 3.

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