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Organisms that look similar have been observed to have differences when preserved in rocks of different ages.
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- Using Index Fossils Problem How can fossils be used to determine the relative ages of rock layers? Introduction It is easy to compare the ages of fossils found in sedimentary rocks at one location. Fossils found in an upper rock layer will be younger than fossils found in a lower layer, unless the layers have been overturned. It is not as easy to compare the ages of fossils found in rocks at different locations. Scientists use index fossils to determine the relative ages of rock layers. Scientists use radiometric dating to find the actual age of rocks and fossils. In this lab, you will work with drawings of rock layers from different locations. Each layer will contain at least two fossils. Using the fossils as clues, you will organize the layers from oldest to youngest. Skills Focus Interpret Visuals, Sequence, Draw Conclusions Materials scissors Safety Do not direct the points of the scissors toward yourself or others. Use the scissors only as instructed. Pre-Lab…true or false? fossils can tell us which organisms live in the past.During the Paleozoic, many life forms developed hard parts (shells/bones/etc.). Why would it be useful for organisms to have hard parts?
- Question 21 What is a transitional fossilP. a fossil that reveals links between groups of organisms a snapshot of an ancestral form fossils found between eras fossils of immature organisms that are not yet in adult form all of the aboveResearchers looking for fossils of the earliest life forms face many hurdles. For example, few sedimentary rocks date back more than 3 billion years. Explain why so few remaining samples of these early rocks remain.A scientist has a fossil that was found in a layer of rock close to Earth’s surface. He believes that the fossil is around 12,000 years old. Which method would best allow the scientist to confirm the actual age of the fossil? finding another fossil in a deeper layer of rock finding another fossil in the same layer of rock using carbon/nitrogen absolute dating using potassium/argon absolute dating
- One type of fish fossil is found only in a rock layer near the bottom of a canyon, while a different kind of fish fossil is found only in a rock layer 4,000 feet higher, near the top of the canyon. Which statement would a scientist most likely offer to explain this situation? A.) The fish in the lower layer lived in the deep sea. While the other fish lived in shallow water. B.) The fish in the upper layer lived a healthier life than the other fish. C.) The rock in the lower layer is denser than the rock in the upper layer D.) The rock in the upper layer must have formed in freshwater E.) The fish in the upper layer lived more recently than the other fish. The Geologic Time Scale is a systematic chronological dating process that relates geological strata to time. This methodology is commonly used be geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that once occurred in history. Which of the following statements can be…What evidence would you look for on Enceladus, Europa or Mars that would tell you that life may have existed there in the past?I need help answering the big font question from my teacher presentation: If evolution is true then why do new species seem to appear out of now ehere in the fossil record?
- Which statement is true? Recent remains of plants or animals on topsoil are fossils. Imprints of leaves or footprints in sedimentary rock are fossils. Insects preserved in hardened tree sap are not fossils. Petrified skeletal bones from an ancient mammal are not fossilsQuestion: Which of the following puts the events in the history of life in the correct order? A- Permian Extinction; Tiktaalik; Pleistocene Megafaunal Extinction; Precambrian Era B- Precambrian Era; Tiktaalik; Permian Extinction; Pleistocene Megafaunal Extinction C- Pleistocene Megafaunal Extinction; Permian Extinction; Precambrian Era; Tiktaalik D- Tiktaalik; Permian Extinction; Precambrian Era; Pleistocene Megafaunal Extinction E- Precambrian Era; Permian Extinction; Tiktaalik; Pleistocene Megafaunal ExtinctionEarth is about 4.5 billion years old. In order to characterize the events that happened in this very long time scale, scientists have developed the geologic time scale. Here, the age of Earth is divided into (1), which in turn divided into (2), and are further subdivided into (3). The geologic time scale is so-called since the different subdivisions are based on the fossil record.