Less than the age of the fossils the rock contains
The number of years since the rock formed
How are half-lives used in Earth Science?
Used to determine the absolute age of rocks
Used to determine the relative age of rocks
Used to determine what the rock is composed of
Used to determine how many fossils are in the rock
The time it takes for half of the radioactive atoms in a sample of radioactive element to decay is the element's...
Relative age
Absolute age
Half-life
Potassium-Argon date
How many half lives have passed when there are approximately 84,000 atoms of the daughter element?
0
1
2
3
The half-life of the parent element is 500 years. If a fossil is found with 50,000 atoms of the parent element remaining, how old is the fossil? Use the graph above to help you answer the question.
