EVIDENCE THAT SUPPORTS EVOLUTION. Pillar #1: The Fossil Record. What is a fossil?. The remains or evidence of an organism Fossilized bone, wood, shell, or dung Casts, imprints, or molds Amber or tar entrapments Imprints of footprints or borings. Fossil Facts.
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If 100 g of Carbon-14 decays until only 25 g of carbon is left after 11, 460 years, what is the half-life of carbon-14?
Thallium-208 has a half-life of 3.053 minutes. How long will it take for 120 g to decay to 7.5 g?
Gold-198 has a half-life of 2.7 days. How much of a 96g sample will be left after 8.1 days?