Figure 5a- Simplified Geologic Time Scale Figure 5b- Trilobite fossil.docx
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Figure 5a. Simplified Geologic Time Scale Figure 5b. Trilobite fossil found in a rock layer Spend some time looking at a simplified representation of the Geologic Time Scale (Figure 5a). On the right you see the major Geologic Eras and Periods. On the left you can see the most characteristic fossils found in rocks corresponding to these ages. Some of these fossils only appear during a specific period of time. For example, trilobites (Figure 5b) were abundant in the early Paleozoic era (Ordovician and Cambrian periods). Scientists use the presence or absence of these fossils to estimate the age of the rocks in which they find them. This is called relative dating. Sometimes it is possible to give rocks a precise age by using radiometric methods and coming up with exact numbers. This is called absolute dating and it involves the principles of the natural radioactivity of rocks. What events defined the major divisions between the Cenozoic, Mesozoic, and Paleozoic eras? What could have caused these major events? Explain your reasoning. .
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Quarter 4 Week 7 Defining and Identifying Subdivisions of Geologic Time Scale...
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Create a personal code of ethics and framework that will guide you in professional and personal decision making.
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1. Your code should address behavior in the following areas: Relationships, Honesty, Integrity, Work Ethics, Transparency, and Diversity.
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1. Why does each of us believe what we do?
2. Why do we choose to respond in a particular way when faced with an ethical dilemma?
3. Describe how your personal code of ethics will help you respond when confronted with an ethical dilemma.
4. How will your personal code of ethics allow you to advance diversity in your workplace? (inclusive environment for everyone, regardless of race, ethnicity, religion, color, national origin, age, disability [physical or mental], sexual orientation, parental status, marital status, and socioeconomic status for example)
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Fil is the vade is the Tale 8. Whidh pooed is not efin inimed i. Which dey in met prese he smues a pecting? probering the dets is the ble bele. b. Wiach piose is kec the miel iftes inutiod?
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Look at the relatively detailed version of the Geologic Time Scale (Figure 6) and pay attention to the absolute ages (millions of years ago). How many years have passed between the first appearance of land plants and the last appearance of the Tyrannosaurus rex dinosaur? Use the numbers provided in the figure to calculate your answer.
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