Radiometric Dating Journal Entry #5 Continued. Radiometric Dating The process of determining the age of fossils by measuring the relative concentrations.

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Presentation transcript:

Radiometric Dating Journal Entry #5 Continued

Radiometric Dating The process of determining the age of fossils by measuring the relative concentrations of radioactive isotopes in a sample.

Radiometric Dating The process of determining the age of fossils by measuring the relative concentrations of radioactive isotopes in a sample. Half-Life: The amount of time it takes for 1/2 of the radioactive isotopes in a sample to decay to the standard atomic weight

Examples es/radioactive_decay3.html es/radioactive_decay3.html

Radiometric Dating Types Carbon-14: Half-life of 5,730 years - useful for samples up to 70,000 years old

Radiometric Dating Types Carbon-14: Half-life of 5,730 years - useful for samples up to 70,000 years old Potassium-40: Half-life of 1.3 billion years - useful for samples older than 100,000 years

Radiometric Dating Types Carbon-14: Half-life of 5,730 years - useful for samples up to 70,000 years old Potassium-40: Half-life of 1.3 billion years - useful for samples older than 100,000 years Uranium-238: Half-life of 4.47 billion years - useful for samples older than 100,000 years