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Scientific Method Revisit

Scientific Method Revisit. Keep your quiz and your scientific method objective sheet in front of you. Quizzes show you what you know and what you need to practice more.

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Scientific Method Revisit

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  1. Scientific Method Revisit • Keep your quiz and your scientific method objective sheet in front of you. • Quizzes show you what you know and what you need to practice more. • As we go over the quiz, add new insights on your objectives. You will need the objective sheets for the final and AP review. • Save all your objective sheets!

  2. Blood sugar and brain shrinkage – Obj #8 • BE SPECIFIC! • Brain damage is too broad. • Once a variable is the Independent Variable, it can’t also be a controlled variable.

  3. Quiz #10 (Obj #7) Please share if you have a starred*** answer.

  4. Quiz #11 (Objective #6) Please share if you have a starred*** anwer

  5. Following these directions will help you prepare for the quiz! • Please get out objectives #1-7 for a stamp. • Use a different colored pen/pencil to add new insights as you compare your work with your neighbor’s. • Read the entire board. • Thanks!

  6. 4th period • Set up an account at www.edmodo.com • APES 4th pd join url: edmo.do/j/kmzbmf • Password: 37xgj2 • Field journal picture must be uploaded by Fri Sept 6 • Trouble? Wed 7:15 or Thursday lunch

  7. 5th period • Set up an account at www.edmodo.com • APES 5th pd join url: edmo.do/j/ege75u • Password: u4p7t8 • Field journal picture must be uploaded by Fri Sept 6 • Trouble? Wed 7:15 or Thursday lunch

  8. 6th pd • Set up an account at www.edmodo.com • APES 6th pd join url: edmo.do/j/mft7d3 • Password: 8zzbxx • Field journal picture must be uploaded by Fri Sept 6 • Trouble? Wed 7:15 or Thursday lunch

  9. I=PAT Impact on the planet = Population of humans X Affluence (individual use of resources) X Technology

  10. Population Ecology What are the rules? They don’t apply to us, do they?

  11. Rule #1: Populations will grow exponentially according to their biotic potential

  12. Linear growth vs. exponential growth

  13. Biotic potential – capacity for growth Age at reproductive maturity Generation time Time between reproductive events Offspring per reproductive event

  14. Rule #2: Populations cannot increase indefinitely

  15. Sigmoidal growth – the S curve

  16. Carrying capacity The number of individuals of each species that can survive in an area indefinitely.

  17. Subtle details! • At carrying capacity (K), individuals are still dying and being born. The total population size is constant. • Populations do not know when they’ve reached K • Populations cycle above and below K several times before leveling out.

  18. Limiting factors set the carrying capacity

  19. Two categories of limiting factors • 1. density-independent limiting factors Natural disasters Clear cutting

  20. 2. Density-dependent limiting factors • Food • Mates • Space • Disease • predators

  21. Rule#3: There is more than one strategy for getting your genes into the next generation

  22. Reproductive similarities?

  23. Reproductive similarities?

  24. Opportunists vs. Competitors

  25. Survivorship curves

  26. Rule #4: Predator and prey develop a predictable pattern.

  27. Lotka-Volterra model

  28. Soooo . . . Good thing we’re human and these rules don’t apply to us . . . Right?

  29. Or do they? What part(s) of the sigmoidal curve do you see? Name two density-dependent and two density-independent factors that apply to humans. Are we r- or K- strategists? Defend your answer. How do humans avoid the Lotka-Volterra model?

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