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Questions and Answers
What is used to determine the age of ancient objects in radio carbon dating?
What is used to determine the age of ancient objects in radio carbon dating?
- Amount of carbon-13 isotopes present in the object
- Amount of carbon-12 isotopes left in the object
- Amount of carbon-12 and carbon-14 isotopes combined in the object
- Amount of carbon-14 isotopes left in the object (correct)
Which type of atom of carbon is radioactive and used in measuring age in carbon dating?
Which type of atom of carbon is radioactive and used in measuring age in carbon dating?
- Carbon-12 and Carbon-13
- Carbon-12
- Carbon-13
- Carbon-14 (correct)
What is the main reason why carbon-14 is used in carbon dating?
What is the main reason why carbon-14 is used in carbon dating?
- It has a longer half-life compared to carbon-12 and carbon-13
- It makes up a higher percentage of an atom than carbon-12 and carbon-13
- It is non-radioactive and remains stable over time
- It is radioactive and undergoes decay at a known rate over time (correct)
If an object originally had 800 carbon-14 atoms and now has 200, how many half-lives have passed?
If an object originally had 800 carbon-14 atoms and now has 200, how many half-lives have passed?
Why does the number of remaining carbon-14 atoms help determine the age of an object?
Why does the number of remaining carbon-14 atoms help determine the age of an object?
What assumption is necessary when guessing how many carbon-14 atoms something had before it died?
What assumption is necessary when guessing how many carbon-14 atoms something had before it died?
What is used to date very ancient geological events that need measurements in millions or billions of years?
What is used to date very ancient geological events that need measurements in millions or billions of years?
In a carbon dating example where an isotope material had 1000 atoms in the year 2000, how many atoms would be present in 2030 given a half-life of 10 years?
In a carbon dating example where an isotope material had 1000 atoms in the year 2000, how many atoms would be present in 2030 given a half-life of 10 years?
If a bean seed initially had 100 carbon-14 atoms, what is the age of a seed with 25 carbon-14 atoms found in two different places?
If a bean seed initially had 100 carbon-14 atoms, what is the age of a seed with 25 carbon-14 atoms found in two different places?
What is the reason for using potassium or uranium isotopes instead of carbon-14 dating for very ancient geological events?
What is the reason for using potassium or uranium isotopes instead of carbon-14 dating for very ancient geological events?
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