Which of the following is the primary technique for determining the absolute age of a rock?

Question

Responses

measuring radioactive decay of element isotopes
measuring radioactive decay of element isotopes

comparing the rock to similar rocks and noting the differences
comparing the rock to similar rocks and noting the differences

comparing the rock to other geologic features
comparing the rock to other geologic features

measuring the dimensions of the rock

Answer 1

measuring radioactive decay of element isotopes