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9. Evolution Theories

9. Evolution Theories . Essential Question: How does the evidence of geology, fossils, and comparative anatomy support the theory of evolution? Learning Target: I can describe who Charles Darwin was and his inference about life on earth.

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9. Evolution Theories

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  1. 9.Evolution Theories • Essential Question: How does the evidence of geology, fossils, and comparative anatomy support the theory of evolution? • Learning Target: I can describe who Charles Darwin was and his inference about life on earth. • Learning Task: I will watch short film clips to learn about Charles Darwin and the inferences he made about life on Earth. I will read about two different theories about how evolution occurred.

  2. Welcome! Warm Up Thursday 4/10/14Week of 4/7 – 4/11 • What is Pangaea? • What does it mean to believe in something? • Record your response at www.goo.gl/vta7d1

  3. Fair Warning • When we return from Spring Break, I will not accept late work without a penalty. • Penalty: Late work will receive a MAXIMUM grade of 70. • Work will not be accepted more than one week late after each progress report.

  4. 4th Quarter Table of Contents 1 Title Assignment # Ice Cores 2 Ice Core Webquest 3 Fossil Notes 4 Getting into the Fossil Record 5 Fossil Vocab 6 Fossils over Time (Molds vs Casts) 7 Law of Superposition Vocab 8 Who’s on First? (Wkst) 9 Geologic Time VOCAB 10 Video: Evolution Questions 11 Evolution Vocab 12

  5. Belief vs. Understanding • Our beliefs are important to us. They are valid and serve valuable purposes in our life • Science isn’t about telling you what to believe – or about telling you that what you believe is wrong. Rather, Science is about UNDERSTANDING the world around us. You don’t have to believe it, but you should understand it.

  6. Video: Evolution – Evolving Ideas • Today we will watch two video clips from the PBS Series Evolution – Evolving Ideas • You will copy the questions for each section into your lab notebook before watching, and then answer the questions while you watch.

  7. Video: Evolution Questions 11Segment 1: Isn't Evolution Just a Theory? • What is a theory? 2. What does Darwin's theory of natural selection aim to explain?  3. What is an inference?  4. What was Darwin's inference?

  8. Segment 1: Isn't Evolution Just a Theory? Full screen/youtube: http://www.youtube.com/watch?v=85diEXbJBIk Original PBS location: http://www.pbs.org/wgbh/evolution/library/11/2/e_s_1.html

  9. Segment 1: Isn't Evolution Just a Theory? Pulls together observations, laws, hypothesis, and inferences into logical explanations 1. What is a theory?  Examples: 2. What does Darwin's theory of natural selection aim to explain? gravitational theory, cell theory, germ theory How new species originate/the diversity of life on earth

  10. Segment 1: Isn't Evolution Just a Theory? 3. What is an inference? 4. What was Darwin's inference? A conclusion drawn from available evidence  All living things come from a common ancestor

  11. Segment 3: How do we know evolution happens? 1. Where is the history of life held? 2. How are whales similar to us? How are they different?  3. Whales have flippers, but what are the bones similar to on the inside?  4. What reason do scientists give for a four-legged animal moving closer to water and giving rise to modern whales?

  12. Segment 3: How do we know evolution happens? Full screen/youtube: http://www.youtube.com/watch?v=ewtw_nZUIDQ Original PBS location: http://www.pbs.org/wgbh/evolution/library/11/2/e_s_3.html

  13. Segment 3: How do we know evolution happens? 1. Where is the history of life held? 2. How are whales similar to us? How are they different? Layers of fossils/The fossil record Similar: mammals, intelligent, nurse their young, warm-blooded  Different: swim like fish, live in water 

  14. Segment 3: How do we know evolution happens?  3. Whales have flippers, but what are the bones similar to on the inside?  4. What reason do scientists give for a four-legged animal moving closer to water and giving rise to modern whales? Similar to bones in monkey arms, frog legs, and birds’ wings Abundant food sources, escape from competition

  15. Most Species that have lived on Earth are now Extinct! • Extinction of species is common. • Extinction of species occurs when the environment changes and the individual organisms of that species do not have the traits necessary to survive and reproduce in the changed environment.

  16. Extinct: The Dodo Bird • The Dodo was a large, flightless bird • It was a relative of pigeons and doves • The last dodo died sometime in the late 17th century http://science.discovery.com/creatures/10-extinct-species.htm

  17. Extinct: The Dinosaurs • Stegosaurus lived way before Triceratops showed up • Tyrannosaurus wasn't feasting on Apatosaurus (he had been extinct for millions of years by that time) • They were all gone by the time human beings came around http://science.discovery.com/creatures/10-extinct-species.htm

  18. Extinct: Passenger Pigeon • These pigeons once blackened the sky as they roamed in flocks numbering in the billions • Westward-bound settlers chopped down the birds' habitat at an alarming pace. • In less than 100 years, this species was in a lot of trouble. • The last passenger pigeon died in a Cincinnati zoo in 1914. http://science.discovery.com/creatures/10-extinct-species.htm

  19. Extinct: Saber-Toothed Tiger • Has been extinct for over 10,000 years • The cat itself was about the size of a modern-day lion (if not a bit shorter), but far more robust • This fierce predator once roamed freely in the grasslands and forests of North and South America • We should probably be happy we're not living in the Ice Age! http://en.wikipedia.org/wiki/File:Smilodon_Skeleton.jpg

  20. In your Lab Notebook: Evolution Vocab 12 • Darwin –a naturalist who proposed and provided scientific evidence that all species of life have evolved over time from common ancestors • Natural Selection – survival of the fittest organisms that are the best adapted to their environment and will live long enough to reproduce and pass on those adaptations • Theory – a explanation that ties together many hypothesis and observations • Create Frayer Models for the words

  21. Competing theories • Inheritance of Acquired Characteristics vs. Natural Selection • Find this assignment in your Stoffregen Science Assignments on the Google Drive • Read, Annotate, and Answer the questions

  22. Exit Ticket • What theory of evolution was proposed by Charles Darwin?

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