0301 Classroom Adaptations


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An activity in class that shows how natural selection works. Students create offspring with genetic diversity, and nature chooses the organism best adapted to survive and reproduce. Over thousands of generations (5-6 rotations) a new species develops.

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0301 Classroom Adaptations

  1. 1. Daily Stimulus #30 What is the difference between artificial selection and natural selection? (MyWay p.50)
  2. 2. Schedule <ul><li>Planner / Daily Stimulus / SWBAT </li></ul><ul><li>7.5.3: Changes Over Time </li></ul><ul><li>Natural Selection: Group Activity </li></ul><ul><li>HW: Imaginary Creatures Project </li></ul><ul><li>Exit Slip </li></ul>
  3. 3. Objectives <ul><li>SWBAT explain that small differences between parents and offspring could produce descendants that look very different from their ancestors (7.5.3) </li></ul><ul><li>SWBAT use natural selection to create new species! </li></ul>
  4. 4. GLOs <ul><li>GLO #2: Community Contributor </li></ul><ul><li>GLO #3: Complex Thinker </li></ul>
  5. 5. 7.5.3 Changes Over Time <ul><li>Explain that small differences between parents and offspring could produce descendants that look very different from their ancestors </li></ul>p.51
  6. 6. Artificial Selection Mankind chooses and breeds an organism, selecting it for a trait that it desires.
  7. 7. Natural Selection Only the organisms with the best genes survive and reproduce to pass on their genes. After many many generations, the species changes into something new.
  8. 8. Basic Needs of Life <ul><li>Nature selects the organisms best adapted to survive in a certain environment. </li></ul><ul><ul><ul><li>Get food and energy </li></ul></ul></ul><ul><ul><ul><li>Get water </li></ul></ul></ul><ul><ul><ul><li>Get air/oxygen </li></ul></ul></ul><ul><ul><ul><li>Protect itself from other organisms </li></ul></ul></ul><ul><ul><ul><li>Protect itself from the climate/weather </li></ul></ul></ul><ul><ul><ul><li>Reproduce: Pass on its genes to its offspring </li></ul></ul></ul>
  9. 9. Evolution is “Adaptation through Natural Selection” p.55? <ul><li>1) Offspring look a little different from their parents and from each other </li></ul><ul><li>2) Not all the offspring will survive </li></ul><ul><li>3) The offspring that can survive better will grow up to have offspring with the same genes; the other ones will die. </li></ul><ul><li>4) Over thousands of generations, new species emerge </li></ul>
  10. 10. Let's See Natural Selection in Action! <ul><li>Let's be Mother Nature </li></ul><ul><li>Let's decide who lives and who dies </li></ul><ul><li>Let's see what happens to organisms over time! </li></ul>
  11. 11. Natural Selection Activity <ul><li>Roles: </li></ul><ul><ul><ul><li>Group Leader: Keeps everybody on task. </li></ul></ul></ul><ul><ul><ul><li>Materials Manager: Gets materials </li></ul></ul></ul><ul><ul><ul><li>Nature : Circles the one that survives. </li></ul></ul></ul><ul><ul><ul><li>Cheerleader: Maintains positivity. </li></ul></ul></ul><ul><li>Keep your markers and tape with you at all times.* </li></ul>
  12. 12. Natural Selection Activity <ul><li>On the poster, each group member must copy AS CLOSELY AS POSSIBLE the organism that is circled. (2min)* </li></ul><ul><li>NATURAL SELECTION TIME!! </li></ul>
  13. 13. Natural Selection (Classroom) p.54 1) Draw your original creature 2) Draw what it looks like after thousands of generations 3) Explain: How did your creature change? 4) Explain: Why did your creature change? What basic need does it get better now?
  14. 14. Objectives <ul><li>SWBAT explain how fossils provide evidence that life and environmental conditions have changed over time (7.5.5) </li></ul>
  15. 15. Whale Evolution http://www.pbs.org/wgbh/evolution/library/03/4/l_034_05.html
  16. 16. Evolution of Whales Ambulocetus Basilosaurus Sperm Whale
  17. 17. Evolution of Whales
  18. 18. More Fossil Evidence <ul><li>http://www.fossilmuseum.net/Paleobiology/Precambrian-Fossils.htm </li></ul>
  19. 19. Exit Slip What are three pieces of evidence that Evolution through Natural Selection has occurred?