Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
The choice that best fits and answers the question is;
D: absorption
I hope this answer is sufficient and has aided you.
Cheers.
False because many different species are going extinct within our lifetime
One of the difference is that the ice cube is solid and gas is not.
