Absolute Dating of Rock

Front

What is absolute dating?

Back

Absolute dating is a method used to determine the actual age of a rock or fossil in years, often through techniques like radiometric dating.

Front

What is a half-life?

Back

A half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

If a radioactive isotope has a half-life of 2,500 years, how much of the original isotope remains after 2 half-lives?

Back

25% of the original isotope remains after 2 half-lives.

Front

What is a parent isotope?

Back

A parent isotope is the original radioactive isotope that undergoes decay to form a daughter isotope.

Front

What is a daughter isotope?

Back

A daughter isotope is the product of the decay of a parent isotope.

Front

TRUE or FALSE: All elements decay over time.

Back

False. Only radioactive isotopes of elements decay.

Front

What is the significance of radioactive decay in geology?

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Radioactive decay allows scientists to measure the absolute age of rocks and fossils.

Front

How do scientists use half-lives in dating rocks?

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Scientists use the known half-lives of radioactive isotopes to calculate the age of rocks based on the remaining amount of the isotope.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the order of events, while absolute dating provides a specific age in years.

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What is carbon-14 dating?

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Carbon-14 dating is a method of absolute dating that uses the decay of carbon-14 to estimate the age of organic materials.