Mass Extinction Events: The Causes And Effects Kieran A. F. Burley A mass extinction is defined as an event when there is a massive decrease in the abundance and diversity of all species on the planet‚ this will occur over a relatively short period of time‚ for any one species an extinction is catastrophic. Extinction events occur continually this results in regular change of all species on the planet and is known as background extinctions‚ sometimes however extinction rates rise suddenly for
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Climates and Oceans- 1. With coastal climates‚ the locations are on the windward side‚ meaning the weather patterns move from the ocean to land‚ giving them mild summers and cool winters. This means that there isn’t a very large temperature range for coastal climates. Inland climates are more of the land heating and cooling‚ because they heat to high temperatures in the day and then cool a great amount at night. Also‚ the weather patterns are moving from land to water‚ creating warmer summers and
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Alfred Wegener was born in Berlin in 1880. His father was a minister who ran an orphanage‚ Alfred was even brilliant as a young child he took interest in the land textures and topography. He took special interest in Greenland‚ and always walked‚ skated‚ and hiked. This prepared him of what was to come in his future. He studied in Germany and Austria‚ receiving his PhD in astronomy. But no sooner than he got his PhD he dropped astronomy (in desire for a more interesting department) to study meteorology
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American Pageant Chapter 1 Summary The first chapter of the American pageant focuses on the discovery of the Americas and how they came to be. The North American continent broke off from a Supercontinent called Pangaea some 200 million years ago. It was anchored in its current position by the Canadian Shield‚ an ancient rock plate below the continent. Many natural wonders of the Americas were created in this period of time‚ like the Appalachian Mountains‚ and the Grand Canyon. After an ice age
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Wenger in 1912. Is the theory of how the earth lithosphere is made up of many separate pieces of the earth’s crust known as tectonic plates. He put forward the idea that all the earth’s continents were once conjoined in one supercontinent called Pangaea‚ and that these continents were moved by convection currents over a period of many millions of years in to their current positions. These convection currents are made by radioactive energy in the earth’s core causing the semi molten mantle to rise
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plate tectonics theory is valid’ Discuss the extent to which you agree with this statement (40 marks) The plate tectonics theory was made by a German named Alfred Wegener. He stated that a single continent existed about 300 million years ago named Pangaea and that it split into two continents of Laurasia in the north and Gondwanaland in the south. Today’s continents were formed by further splitting of the two masses. Evidence to support this theory is that there is that there have been fossils
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Falcon? What do Historians and Archaeologists have in common? How are they different? In which regions did the writing system originate? How do archaeologists come up with conclusion? Where did the first humans arrive from? What is Pangaea? When did Homo sapiens begin to move from Africa to Europe and Asia? Beringia Who were the Paleo-Indians? Why did humans wander into North America after 15‚000 BP? Why is the Paleo-Indian spear point named Clovis point? What happened
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general they are all different in what they state. Sea-floor spreading states how trenches release magma that adds new oceanic crust. Continental drift states that continents “drift”around earth’s surface and were once part of a supercontinent‚ called Pangaea. Plate tectonics state how different sections of the Earth move around (Continental 1). The theories all represent and state something different‚ and are supported with different pieces of
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within which the quote was found‚ and briefly explain the quote’s meaning within the text. Try to answer the “who‚ what‚ so what‚ why‚ where‚ and when.” (4 points possible) (Total points possible: 30) 1. “Pieces of a Puzzle: The Evidence for Pangaea” IR2 2. Outliers by Malcolm Gladwell: a. Ch. 5
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Quiz #2: Chapters 5-6 Fill in the blanks. (5 points each) PART I A. Asthenosphere D. Ocean ridge system B. Lithosphere E. Alfred Wegener C. Pangaea 1. A single supercontinent consisting of all Earth’s landmass that began to break up about 200 million years ago was called C. 2. In 1915‚ a German meteorologist and geophysicist named E wrote The Origin of Continents and Oceans and set forth a basic outline
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