Practice problem
Which of these are examples of relative dating? Select all correct answers.
Stratigraphy, or determining a fossil's age by rock layer it was found in
Potassium-Argon dating, or determining a fossil's age by the ratio of potassium to argon isotopes
Paleomagnetism, or determining a fossil's age by the orientation of its magnetic particles
Index fossils, or determining a fossil's age based on other fossils found around it
Type a concept, like “slope” or “photosynthesis”.