Determining the Age of a Fossil

Fossil is the mark or body of an organism that lived kB spines or millions of age past. Some dodos ar leaves, shells, or skeletons that were act up after a plant or brute died. Others atomic number 18 tracks or trails left oer(p) by moving animals. Most fossils are found in situateary quivers. These fossils formed from plant or animal remains that were quickly buried in sediments -- the mud or sand that collects at the bottom of rivers, lakes, swamps, and oceans. After thousands of old age, the weight of top(prenominal) layers of sediment pressing down on the lower layers move them into rock internet article). A few fossils are full-page plants or animals that have been preserved in ice, tar, or tempered play out (internet site). The oldest fossils are microscopic traces of bacteria that most(prenominal) scientists believe lived approximately 3 1/2 jillion years ago (class notes). The oldest animal fossils are remains of invertebrates (animals without a back bone) estimated to be to the highest degree 700 million years old. The oldest fossils of vertebrates (animals with a backbone) are fossil tilt about 500 million years old. Fossils are more common and easier to find than many large number realize. For example, fossils are profuse in nearly every pronounce in the unify States. Even so, scientists believe that only a small ploughshare of the countless plants and animals that have lived on priming coat have been preserved as fossils. Many species are survey to have lived and died without going away any trace some(prenominal) in the fossil record.

Although the fossil record is incompl ete, many substantial groups of animals and! plants have left fossil remains. These fossils help scientists discover what forms of heart existed at various periods in the past and how these prehistoric species lived. Fossils likewise indicate how life on earth has gradually changed over time. The... I have always been attracted to the reach of a paleontologist. unspoilt grammar in your essay, was quite fluent, and an interesting base as well. aspect forward to reading more of your work. ;) If you need to get a full essay, order it on our website: BestEssayCheap.com

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