Question

Which of the following are absolute radioactive isotope dating methods? (A) Radiocarbon Dating
(B) Potassium/Argon Dating
(C) Thermoluminescence
(D) Fluorine Dating
Choose the correct answer from the options given below:

• A. (A), (B) and (C) only
• B. (A), (B) and (D) only
• C. (A), (C) and (D) only
• D. (B), (C) and (D) only

Hint:

Absolute dating methods like Radiocarbon Dating, Potassium/Argon Dating, and Thermoluminescence provide precise ages, unlike relative dating methods like Fluorine Dating.

Answer 1

The Correct Option is A

Step 1: Understanding absolute dating methods.
Absolute dating methods ascertain the precise age of an object or specimen through the measurement of radioactive isotopes. The methods are as follows:
- Radiocarbon Dating (A): An absolute dating method for organic materials, measuring the decay of carbon-1(4).
- Potassium/Argon Dating (B): Used to date volcanic rocks and fossils by measuring the ratio of potassium to argon isotopes.
- Thermoluminescence (C): Dates materials such as ceramics and rocks by measuring emitted light upon heating.
- Fluorine Dating (D): A relative dating method comparing fluorine accumulation in bones, not an absolute method.
Step 2: Conclusion.
Radiocarbon Dating, Potassium/Argon Dating, and Thermoluminescence are absolute dating methods.
Final Answer: \[\boxed{\text{The correct answer is (1) (A), (B) and (C) only.}}\]