Question

open - ended questions

1. explain how potassium - argon dating works, including its advantages and limitations.

Explanation:

Potassium - argon dating is a radiometric dating method. Potassium - 40 is a radioactive isotope that decays to argon - 40 at a known rate. By measuring the ratio of potassium - 40 to argon - 40 in a sample, the age of the sample can be calculated. Advantages include its ability to date very old rocks (billions of years old) and its wide applicability to volcanic rocks. Limitations are that it requires a sample with sufficient potassium, and argon can be lost or contaminated, leading to inaccurate results.

Answer:

Potassium - argon dating works by the decay of potassium - 40 to argon - 40 at a known rate. Advantages: Can date old rocks, applicable to volcanic rocks. Limitations: Requires sufficient potassium in sample, argon can be lost or contaminated.