That is, the earth accreted from small, cold chunks of material and then heated up at a later time.
Isotope: A version of an atom that differs from other atoms of the same element only in the number of neutrons.
Mountains, erosion, and variations in climate were considered to be punishment for the sins committed by humanity.
Buffon's Iron Sphere Experiments- On the basis of iron sphere cooling experiments, Frenchman Georges de Buffon estimated that the Earth would have needed 75,000 years to cool to its present temperature.
For example, isotopes with very long half lives are no good for dating rocks younger than about 100 million years.
This is because, in just 100,000,000 years of time, not enough parent will have decayed for daughter concentrations to be reliably measured.
Could it be that the whole scientific community has missed this point, or is it another case of creationist daydreaming?This argument was popularized by Henry Morris (1974, p.164), who used some calculations done in 1968 by Melvin Cook to get the 10,000-year figure. Whitelaw, using a greater ratio of carbon-14 production to decay, concluded that only 5000 years passed since carbon-14 started forming in the atmosphere!The argument may be compared to filling a barrel which has numerous small holes in its sides.Now, the fuller that barrel gets the more water is going to leak out the thoroughly perforated sides, just as more carbon-14 will decay if you have more of it around.Finally, when the water reaches a certain level in the barrel, the amount of water going into the barrel is equal to the amount leaking out the perforated sides.