Facts carbon 14 dating
Fossils document the order of appearance of groups and they tell us about some of the amazing plants and animals that died out long ago.Fossils can also show us how major crises, such as mass extinctions, happened, and how life recovered after them.
Since then, geologists have made many tens of thousands of radiometric age determinations, and they have refined the earlier estimates.Current understanding of the history of life is probably close to the truth because it is based on repeated and careful testing and consideration of data.The rejection of the validity of fossils and of dating by religious fundamentalists creates a problem for them: Fossil sequences were recognized and established in their broad outlines long before Charles Darwin had even thought of evolution.Other critics, perhaps more familiar with the data, question certain aspects of the quality of the fossil record and of its dating.These skeptics do not provide scientific evidence for their views.The alkali metals themselves react with many organic compounds, particularly those containing a halogen or a readily replaceable hydrogen atom.
Sodium is by far the most important alkali metal in terms of industrial use.
New discoveries have filled in the gaps, and shown us in unimaginable detail the shape of the great ‘tree of life’.
Darwin and his contemporaries could never have imagined the improvements in resolution of stratigraphy that have come since 1859, nor guessed what fossils were to be found in the southern continents, nor predicted the huge increase in the number of amateur and professional paleontologists worldwide.
Also includes info on how fossils are formed, the “cleaning, preparing, & repairing” of fossils, and other useful resources.
produces excited sodium atoms that emit the light we see as the “tail” of a meteor as well as the more diffuse atmospheric nightglow.
Smaller amounts of lithium and potassium are also present.