Evolution of the Earth The planet earth has gone through much abuse and punishment in the past. Formed approximately 4.5 billion years ago‚ the earth has undergone multiple catastrophic asteroids erasing species after species. Due to geologic evidence‚ it is estimated over 90 percent of all life that had ever lived in this planet have been extinct. No more than the past 500 million years alone‚ 50-90 percent of all organisms on earth were wiped out of the geological timeline without any warning
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different in older or newer editions. 2. What was the first line of evidence that led early investigators to suspect that the continents were once connected? The puzzle-like fit of the continents‚ especially Africa and South America. 3. What was Pangaea? Pangaea‚ the supercontinent named by Alfred Wegener‚ is thought to have begun to break apart about 200 million years ago. 4. Describe the four kinds of evidence that Wegener and his supporters gathered to substantiate the continental drift hypothesis
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Restless Earth Key Terms... Key Term Meaning Anticline A fold that is convex up and has its oldest beds at its core. Ash cloud A large cloud of smoke and debris that forms over a volcano after it erupts. Collision zone When 2 continental plates collide. Neither plate is forced under the other‚ nor so both are forced up and form fold mountains. Composite volcano Composite volcanoes are made up of alternating layers of lava and ash (other volcanoes just consist of lava). They are usually found at
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fossil record supports and gives credence to the theories of the super continent known as Pangaea. Evidence for Pangaea includes fossil distribution. In terms of fossil distribution‚ paleontologist have found matching fossil remains of ancient species in continents are separated by thousands of miles of oceans today. Based on the evidence scientists have found in plate tectonics‚ it is likely that Pangaea was not the only super continent to exist on Earth but perhaps even more. Data found in fossils
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Since the beginning of civilization‚ mythology and religion have existed as an explanation to the unexplainable. The Nez Perce tale‚ Coyote Finishes His Work ‚ talks about the spirit‚ Coyote‚ and his work on earth up to the point where he met the Great Spirit. The works of Coyote‚ and the message left behind by the Great Spirit‚ parallel those by beings of other mythologies and religions. Each one involves an archetypical figure who acts as a supreme deity‚ and another which teaches and aids humankind
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A most recent inquiry into climatic change during the ice age and it ’s possibility of reoccurring is the Snowball Earth Hypothesis advanced by Paul Hoffman of Harvard University. Snowball Earth Suggest that before the Ice age‚ continents ice free at the poles enhanced the reabsorption of carbon dioxide through erosion of silicate minerals‚ reducing the greenhouse effect making the earth colder until it reached a runaway point. This effect is Hoffman calls albedo‚ when the atmosphere becomes so cold
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plant and animal fossils as well as a number of climatic conditions anomalies existed in some continents. Therefore‚ a conclusion was made that all the continents were all at one time connected in a single supercontinent called a Pangaea. The gradual drifting away of the Pangaea into seven sections namely: North America‚ South America‚ Africa‚ Europe‚ Asia‚ Antarctica‚ and Australia around 300 million years ago is known today as the continental drift. Plate tectonics is accountable for the majority
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moving was not accepted until it was clear from things such as maps and satellites which clearly show how continents such as south America and Africa used to fit together. Pangaea was a supercontinent that formed around 300 million years ago and began to break apart around 200 million years ago‚ during the times of the Pangaea of the land was on one continent and all of the sea was one giant ocean. This theory was coined during a 1927 symposium discussing Alfred Wegener’s theory of continental drift
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British debt lead to new taxes and trade restrictions which led to conflict. 5. How old is planet Earth? 4 billion years old. 6. What is Pangaea? Pangaea is that the earth continents that formed together as one large landmass. 7. What club pangea to break apart? The continents began to separate due to continental drift. 8. What evidence has partially proving the existence of Pangaea? The same species or extremely similar species of fish were found in lakes in different continents which proves that at o
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Before all the continents were separated‚ they existed as one supercontinent‚ Pangaea (Lovett‚ 2008)‚ surrounded by a super ocean‚ known as Panthalassa. Movement of continents can be compared to the movement of icebergs on water. This is because earth is liquid inside. As the liquid moves‚ the crust moves with it‚ the tectonics plates move with it‚ causing the continents to move with it too. Figure 1: Supercontinent Pangaea PROOF Among
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