Absolute Dating
Flashcard
•
Science
•
6th - 8th Grade
•
Hard
Barbara White
FREE Resource
Student preview
8 questions
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1.
FLASHCARD QUESTION
Front
Geological Dating Noun
[jee-uh-loj-i-kuhl day-ting]
Back
Geological Dating
The process used by geologists to determine how long ago rocks or other geological features formed on Earth.
Example: This diagram shows how index fossils help determine the absolute age of rock layers. Layers in different locations with the same index fossil are the same age.
2.
FLASHCARD QUESTION
Front
Relative Dating Noun
[rel-uh-tiv day-ting]
Back
Relative Dating
A method of determining the age of an object or event in comparison to others without assigning a specific numerical age.
Example: This diagram shows rock layers. The position of each layer and how they cut across each other helps determine their age order without using exact numbers.
3.
FLASHCARD QUESTION
Front
Absolute Dating Noun
[ab-suh-loot day-ting]
Back
Absolute Dating
Any method of measuring the age of an event or object in years, typically by analyzing its chemical or physical properties.
Example: This graph shows radioactive decay. After each 'half-life' passes on the x-axis, the amount of the original substance on the y-axis is reduced by half.
4.
FLASHCARD QUESTION
Front
Radioactive Dating Noun
[ray-dee-oh-ak-tiv day-ting]
Back
Radioactive Dating
A technique for the absolute dating of materials by precisely measuring the decay of their constituent radioactive isotopes.
Example: This diagram shows how radioactive parent atoms in a rock decay into stable daughter atoms over time. By measuring the ratio, scientists can calculate the rock's age.
5.
FLASHCARD QUESTION
Front
Half-life Noun
[haf-lahyf]
Back
Half-life
The time required for half of the radioactive atoms in a sample to decay into a more stable daughter element.
Example: This graph shows that after each half-life (5,730 years for carbon-14), the amount of the remaining radioactive substance is reduced by half.
6.
FLASHCARD QUESTION
Front
Carbon Dating Noun
[kahr-buhn day-ting]
Back
Carbon Dating
A method of absolute dating used to determine the age of organic materials based on the decay of carbon-14.
Example: Living things absorb carbon, including radioactive C-14. After death, C-14 decays at a known rate, allowing scientists to measure the remaining amount to determine age.
7.
FLASHCARD QUESTION
Front
Carbon-14 Noun
[kahr-buhn fawr-teen]
Back
Carbon-14
A radioactive isotope of carbon used in dating fossils and organic remains up to approximately 60,000 years old.
Example: This diagram shows a Carbon-14 atom, which has 6 protons and 8 neutrons in its nucleus, making it an unstable form of carbon.
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