Dinosaurs can be classified in the groups known as ornithischians that are bird-hipped dinosaurs. The saurischian‚ were reptile-hipped dinosaurs. Even though birds are avian their common ancestor are non-avian saurischians. “Birds have many ancestors such as the Dilophosaurus‚ Allosaurus‚ Tyrannosaurus‚ Velociraptor‚ and lastly leading to the Archaeopteryx. The closest ancestor of dinosaurs to birds are the Archaeopteryx. From each lineage or generation dinosaurs inherited certain features that make
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Lab 7: Geologic Time 9 Answer Sheet Name(s) 1. As an example of how radioactive decay works‚ the TA may lead a small demonstration. Each student will receive one penny and stand up. At this point all of the students are parent isotopes. Every student should then flip their penny. Students whose penny lands heads-up should sit down. These students who are now seated are now daughter isotopes. The remaining standing students should again flip their penny‚ and students whose penny lands heads-up
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events in the geologic time scale and fossil record to gain an understanding of the structural and biological history of our planet. One of the debated and studied areas of Earth’s history is the sudden occurrence of multicellular hard-shelled organisms from soft bodied and single celled organisms in the Precambrian-Cambrian boundary. The debut of hard parts in the fossil record is believed to have occurred 570 million years ago with common species in the fossil record like the Trilobite. The controversy
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Charles D Walcott was on the top of his of his horse‚ itching to get a good look at some fossils. As he continued to travel‚ he heard a sharp crack. He looked down‚ thinking his horse’s leg broke‚ but then stared in awe at the perfectly preserved fossil. This is the legend of how Mr.Walcott discovered the Burgess Shale‚ the cluster of fossils that changed geology forever. The Burgess Shale is found in Yoho Park‚ British columbia. Back when they were formed‚ the area where they were found was called
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Alaska’s first elasmosaur fossil excavated The fascination with dinosaurs Since much about the early phase of the world is still much unknown‚ or at least mysterious‚ many are drawn to that particular era. Who wouldn’t‚ what with the exotic sea creatures and land creatures that lived in those times and would eventually become extinct or evolve to the animals of today? There are thousands of museums across the world featuring exhibits of these ancient creatures. One of those exhibits is in the University
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and sells the shells that she finds. Mary Anning was a young woman born to a working class family that lived in Lyme Regis‚ a small seaside town in England. She grew up helping her father comb the beaches for fossils they would sell to tourists. Even after her father died‚ Mary kept up the fossil collecting practice in order to sustain her mother and brother. But what started out as a means of survival for the Annings turned out to impact the world of paleontology in the early 19th century‚ though Mary
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The Renaissance was the transitional period between the Dark Ages and the Age of Enlightenment. It’s meaning‚ rebirth‚ symbolizes human‚ cultural‚ political‚ and economic regeneration. Events at the end of the Middle Ages‚ beginning in the 12th century‚ started a reformation of these ideals. The Renaissance started in Florence‚ Italy in the beginning of the 14th century. The Renaissance was earliest expressed through Humanism. The effect of Humanism helped men leave behind mental restraints caused
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Fossil Fuels Josh Farrar 11/16/13 The three types of fossil fuels that are used for energy provision are coal‚ oil‚ and natural gas. Fossil Fuels are the remains of once living organisms‚ but it takes centuries to form the organic matter. Coal is millions of years of decaying land vegetation (dead plants) that will form the solid fossil fuel under intense pressure. Oil is formed on the sea floor from the remains of marine microorganisms and is deposited
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shallow‚ warm sea. This is indicated by the presence of Trilobite fossils found in this layer which thrived in that environment. Trilobites were early animals that had exoskeletons that are usually the only part of them that is preserved in the fossil record. They were marine bottom feeders who thrived in warm nutrient rich waters. The Redwall and Temple Butte limestone that compromises the next layer of rock and the marine fossils there indicate that the sea had deepened and given rise to a more
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untrained eye‚ but to Charles Doolittle Walcott and other paleontologists‚ it is a treasure trove of thousands of uniquely preserved fossils. Millions of years ago‚ North America rested on the equator. Earth was still too young for terrestrial plants and animals to inhabit the hostile land; instead‚ they dwelled in the sea where a vast array of organisms thrived. The fossil records beautifully preserved in the shale rock‚ tell the story of the Cambrian Explosion‚ a period where organisms evolved at
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