Radioisotope dating fossils
However, by itself a fossil has little meaning unless it is placed within some context.
The age of the fossil must be determined so it can be compared to other fossil species from the same time period.
" First, the relative age of a fossil can be determined.
Scientists calculate ages by measuring how much of the isotope remains in the substance.
Continue Reading The key to an age of a substance is the decay-product ratio.
Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free.
These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing.