Half Life Graph Practice

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12 billion years

A rock sample has .5 million atoms left of a radioactive element. Approximately how old is this rock?

17,100 years

A rock sample has 12% of its original carbon-14 remaining. Approximately how old is this rock?

28,500 years

A rock sample has 2% of its original carbon-14 remaining. Approximately how old is this rock?

5,700 years

A rock sample has 50% of its original carbon-14 remaining. Approximately how old is this rock?

absolute dating

A technique used to determine the actual age of a fossil or rock

58 billion years

A rock sample has .05 million atoms left of a radioactive element. Approximately how old is this rock?

42 billion years

A rock sample has .12 million atoms left of a radioactive element. Approximately how old is this rock?

isotope

Atoms of the same element that have different numbers of neutrons

5,700 years

Based on this graph, what is the half life of carbon-14 (the time it takes for half of its radioactive material to decay)?

12 billion years

Based on this graph, what is the half of the element depicted on the graph (the time it takes for half of its radioactive material to decay)?

a type of rock that forms from the cooling of molten rock at or below the surface and can be used for absolute dating

igneous rock

parent isotope

the isotope that undergoes decay

radioactive decay

the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element

daughter isotope

the stable product of radioactive decay


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