Question

question 18
2 pts
which of the following is a nonisotopic method of chronometric dating?
o thermoluminescence
electron - spin resonance
dendrochronology
o radiocarbon dating

Explanation:

• Thermoluminescence: Relies on the accumulation of energy in a material from radioactive sources, which is related to isotopic processes as it involves radioactive decay products.
• Electron - spin resonance: Measures the number of unpaired electrons in a sample, which can be affected by radiation (often from isotopes).
• Dendrochronology: This method dates by counting tree rings. It has no direct relation to isotopic measurements. Trees grow annually, and the ring patterns can be used for chronological dating without any isotopic analysis.
• Radiocarbon dating: Explicitly uses the isotopic ratio of carbon - 14 (a radioactive isotope) to carbon - 12.

Answer:

dendrochronology