When such material does die, the material stops absorbing carbon-14 and the carbon-14 within it begins to decay.
And on the basis of these methods, many scientists announce that the Bible's record of history is not accurate.
One also assumes that all the sand is in the bottom of the glass when one turns it over. He must look for something in the bone which disappears over time, as the sand disappeared from the top chamber of the egg timer.
The disappearance must take place at a known and measurable rate.
By tipping the glass when the egg starts cooking, one learns when three minutes are up and the boiling should be stopped.
One assumes that there is enough sand in the timer so that it takes three minutes for it to move from the top of the glass to the bottom of the glass.