dating planets Flashcards
1
Q
age of earth
A
4550 million
2
Q
method used to date a planet
A
radiometric dating - decay of radioactive isotopes
3
Q
what does radiometric dating use to get age
A
1) half life (rate at which the radio active isotope decays)
2) amount of the radioactive isotope incoprated in object when it formed
4
Q
accurate?
A
degree of uncertainty, usually
