DQ - example, we can correlate a low oxygen environment on...

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DQ#2: Scientists debate about the use of fossils as a tool to determine records of various events, such as the vanishing of the dinosaurs or the origin of our ancestors. Based on what you know of fossils from your textbook and other sources, discuss the role of fossils in helping scientists develop accurate records of the geologic history of the Earth. Address important discoveries such as the 3.3-million-year-old fossilized remains of a child in the Dikika region of Ethiopia. Fossils can be dated to give us an age that the creature lived. In this way, when we find this fossil we immediately have an idea of the age of the rock. But in addition, fossils live in certain environments. Finding fossils tells us about the environment that the rock layer was experiencing. Also, we can learn about the health of the species by studying the fossil. Finally, we can learn about changes to the earth by looking at the fossils. For
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Unformatted text preview: example, we can correlate a low oxygen environment on the earth with the rise of the dinosaurs (which had a special lung adapted for low oxygen levels, the precursor of the lungs birds now have). Likewise all of this information can be used for fossils of human remains. We can learn where our ancestors lived, what their health was like, what they ate, where they migrated, and why. For example, with the three year old child that was found in Ethiopia in the Dikika Region. With this fossil, the scientist can determine the age of the child, the medical condition, and living behavior. The fossil includes the complete skull, brain impression, vertebrae of the neck, hand, shoulder blade, and both collarbones. All this information showed that there might be a link between the apes and human....
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This note was uploaded on 06/28/2010 for the course SCI 230 SCI/230 taught by Professor Trevorklein during the Spring '10 term at University of Phoenix.

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