Radioactive Dating
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Science
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8th Grade
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Standards-aligned
Anthony Kaltenbach
Used 104+ times
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8 Slides • 11 Questions
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Radioactive Dating
Chapter 6 Lesson 3
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Multiple Choice
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Absolute Dating is what scientists use to understand things like the age of the Earth, the age of fossils, and the age of remains.
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One absolute dating method is known as "Radiometric Dating"
isotope is an element with a different number of neutrons.
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Multiple Choice
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What does it mean to be radioactive?
It means that the particle is unstable and is giving off energy.
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This is an example of how this decay might be represented.
Notice the "Parent isotope" has particle leaving it. The other named particle is the "daughter isotope".
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Multiple Select
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Half-lives
When 1/2 of an element decays, this is known as a half life.
All unstable, radioactive, elements have a specific decay rate and it is unique to that element.
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Multiple Choice
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Figuring out the number of half-lives.
By looking at the percentage or fraction of element that has decayed you can determine how many half lives have gone by.
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Multiple Choice
If the red represents the unstable isotope, how many half lives have gone by for this unknown element?
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Multiple Choice
If the red represents the radioactive element, how many half-lives have gone by for this unknown element?
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How many years?
After you know how many half-lives have occurred you simply multiply that number by the amount of time it takes for that element to decay.
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Multiple Choice
Carbon 14 has a half life of 5,730 years. If there is 50% of the Parent Isotope left, how old is the sample?
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Multiple Choice
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Multiple Choice
If you only have 6.25% left of a sample how many half-lives have gone by?
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Multiple Choice
What is the name of the daughter isotope in this image?
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Fill in the Blanks
When there is 87.5% daughter isotope in a sample, how much parent isotope is left?
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Radioactive Dating
Chapter 6 Lesson 3
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