Determining the Age of a Fossil

Fossil is the mark or body of an organism that lived railyard spines or millions of age past. Some dodos argon leaves, shells, or skeletons that were maintain after a plant or animate being died. Others ar tracks or trails left everyplace(p) by moving animals. Most fossils argon 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 days, the weight of upper layers of sediment pressing down on the lower layers cancelled them into rock internet article). A few fossils are unit of measurement plants or animals that have been preserved in ice, tar, or hard-boiled play out (internet site). The oldest fossils are microscopic traces of bacteria that near scientists believe lived approximately 3 1/2 one million million years ago (class notes). The oldest animal fossils are remains of invertebrates (anim als without a backbone) 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 mass realize. For example, fossils are profuse in nearly every verbalize in the unify States. Even so, scientists believe that only a small ploughshare of the countless plants and animals that have lived on soil have been preserved as fossils. Many species are fancy to have lived and died without going away any trace whatever in the fossil record.

Although the fossil record is incomplete, many authorized groups of animals and plants have l eft fossil remains. These fossils help scien! tists discover what forms of disembodied spirit existed at various periods in the past and how these prehistoric species lived. Fossils alike indicate how life on earth has gradually changed over time. The... I have always been attracted to the reach of a paleontologist. bully grammar in your essay, was quite fluent, and an interesting base as well. tone forward to reading more of your work. ;) If you need to get a full essay, order it on our website: OrderEssay.net

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