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16.1 Darwin’s Theory of Evolution The Puzzle of Life’s Diversity Q: What is the puzzle scientist are trying to solve about all the living things on earth? • How did all these different organisms arise? • How are they related? Evolution: A theory based on scientific facts, observations, and hypotheses that solves this puzzle of diversity Theory: A well supported, testable explanation of phenomena that have occurred in the natural world Voyage of the Beagle • 1831 H.M.S Beagle set sail for a trip around the world • On this trip Charles Darwin made observations which led to his evolutionary hypothesis about the way life changes over time Darwin’s Observations The Galapagos Islands • Close together but very different climates • The giant tortoises varied in predictable ways • Lets look at the neck length and shell shape pg. 371 The Journey Home Q: Did animals on different islands once belong to the same species? Ideas that shaped Darwin’s Thinking • State how Hutton and Lyell described geological Change • Identify how Lamarck thought species evolved • Describe Malthus’s theory of population growth Biology and History • 1785 James Hutton • 1798 Thomas Malthus • 1809 Jean-Baptiste Lamarck • 1831 Charles Darwin • 1833 Charles Lyell • 1858 Alfred Wallace ET: Create this chart in your notebook Name Date Information Hutton 1795 Very slow processes formed the Earth’s surface over millions of years Lyell 1820’s – 1830’s Principles of Geology – caused Darwin to understand how process we observe now also existed in the past and must be used to explain what happened in the past Lamarck 1809 Malthus 1798 Selective use or disuse caused change in species War, famine, and disease control populations Darwin’s Dangerous Idea Todays Habits of Mind • Asking genuine questions • Explain your reasoning • Listen to understand LT: Todays film will address the following Power Standards: • Who is Charles Darwin and what were his contributions to the theory of evolution • What ideas/other peoples research influenced Darwin in his development of his theory on evolution