Question

Use the drop-down menus and what you have learned about potassium-argon dating to complete the sentences.

Radioactive dating can be compared to an hourglass, with the
elements on the top.

Scientists compare
in the rock to determine its age.

Potassium-argon dating is ideal for dating
and
rock.

Answer 1

Radioactive dating can be compared to an hourglass, with the **parent** elements on the top.

Scientists compare **the ratio of parent to daughter isotopes** in the rock to determine its age.

Potassium-argon dating is ideal for dating **volcanic** and **igneous** rock.