Half Life Graph Practice
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
