The biggest assumption is that, to first order, the number of asteroids and comets hitting the Earth and the Moon was the same as for Mercury, Venus, and Mars. The bottom line is that the more craters one sees, the older the surface is.
This can be interpreted in two ways: why it is important to know the age of a planet or how is age dating important in determining the age of a planet?
This technique is not restricted to bones; it can also be used on cloth, wood and plant fibers.
black women dating in - How do scientists use radioactive dating
The age of the carbon in the rock is different from that of the carbon in the air and makes carbon dating data for those organisms inaccurate under the assumptions normally used for carbon dating.
This restriction extends to animals that consume seafood in their diet.
The mass spectrometer is able to give information about the type and amount of isotopes found in the rock.
Scientists find the ratio of parent isotope to daughter isotope.
These are the surfaces that we can get absolute ages for.