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London 1854 Outbreak! Mystery Illness Kills Many!

In this lab, students investigate a mystery illness outbreak in London in 1854. Using clues and the scientific method, they must identify the source of the illness and its symptoms.

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London 1854 Outbreak! Mystery Illness Kills Many!

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  1. Chapter 2 • MYSTERY DISEASE LAB • REVIEW OF SCIENTIFIC METHOD • APPLICATION OF SCIENTIFIC METHOD

  2. LAB

  3. When and where do you think this drawing is taking place? What do you think were the environmental and social conditions of the time?

  4. HEADLINE: LONDON 1854 OUTBREAK! Mystery Illness Kills Many! • 127 Die from mystery illness, many other towns people flee!! • Your job: Use the Clues to find the Source of the mystery Illness. SYMPTOMS: Victims have, EXPLOSIVE DIARRHEA that leads to extreme dehydration that kills in 24-48 hours.

  5. BellWork 10-5-10 • Describe the lab activity from yesterday’s class… • What did you think of the lab? • Did you work well with your group? • Was there a group leader? if so did you appoint the leader or did they just assume the role?

  6. OBJECTIVES • Examine and Apply Scientific Method • Apply parts of scientific experiments

  7. SO …WHERE & HOW? • TELL ME, what did you conclude? • Was it….The butcher?.. • The Baker?... • The toilets?

  8. CHOLERA • Disease symptoms include: • Intense watery diarrhea • Vomiting Leading to: • Leg cramps • Dehydration • Shock

  9. CHOLERA IS CHOLERA STILL A THREAT? VIDEO

  10. Broad Street • Eventually 616 people died of the cholera outbreak on Broad Street… • Dr. Snow used the scientific method and correlation to determine where and what the contamination source was. • Read Article on DR.SNOW and CHOLERA • Mode of Communication of Cholera (John Snow, 1855)

  11. Scientific Method • Dr. Snow used the scientific method to determine where the contamination of Cholera was coming from. • We will review the scientific method. This IS a review so you already know the steps and how they work. • Let’s begin

  12. The Scientific Method involves a series of steps that are used to investigate a natural occurrence.

  13. Scientific Method Problem/Question Observation/Research Formulate a Hypothesis & Prediction Experiment CollectData and AnalyzeInformation Conclusion Communicate the Results

  14. ACRONYM …make one up • Problem • Observation • Hypothesis • Experiment • Data • Conclusion • Results • Please • Offer • Her • Enough • Dark • Chocolate • Raisins

  15. Steps of the Scientific Method Problem/Question: Develop a question or problem that can be solved through experimentation.

  16. Steps of the Scientific Method Observation/ Research: Make observations and research your topic of interest.

  17. Do you remember the next step?

  18. Steps of the Scientific Method Formulate a Hypothesis: Predict a possible answer to the problem or question. Make a prediction (If / Then statement) .

  19. Hypothesis The hypothesis is an educated guess based on observations (about the relationship between the independent and dependent variables).

  20. HYPOTHESIS Give me an example of a hypothesis. I think warmer soil will increase the growth of plants

  21. PREDICTION /FORMAL HYPOTHESIS • The prediction is an IF / THEN statement based on the relationship between the dependent and the independent variable • Example: If soil temperatures rise, then plant growth will increase.

  22. Hypothesis VS guess • Hypothesis is based on observations whereas, a guess is not.

  23. Steps of the Scientific Method Experiment: Develop and follow a procedure. The outcome must be measurable - (quantifiable) uses numbers.

  24. Steps of the Scientific Method Collect data and Analyze Results: Modify the procedure if needed. Include tables, graphs, and photographs.

  25. HOW DO YOU CONFIRM RESULTS? RETEST!!

  26. Steps of the Scientific Method Conclusion: Include a statement that accepts or rejects the hypothesis. Make recommendations for further study and possible improvements to the procedure.

  27. Steps of the Scientific Method Communicate the Results: Be prepared to present the project to an audience.

  28. Think you can name all seven steps? Collect and Analyze Results Formulate a Hypothesis Communicate the Results Observation/Research Problem/Question Experiment Conclusion

  29. HW : WKSHT due tomorrowACRONYM …make one up • Problem • Observation • Hypothesis • Experiment • Data • Conclusion • Results • Please • Offer • Her • Enough • Dark • Chocolate • Raisins

  30. independent variable • The independent variable is the topic of interest that is changed by the scientist. • To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens.

  31. dependent variable • The measureable effect caused by the independent variable. • The new value of the dependent variable is caused by and depends on the value of the independent variable

  32. independent variable • The independent variable is the one that is changed by the scientist. • To insure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens.

  33. dependent variable • The scientist focuses his or her observations on the dependent variable to see how it responds to the change made to the independent variable. • The new value of the dependent variable is caused by and depends on the value of the independent variable

  34. Experimental group • Receives EXPERIMENTAL TREATMENT

  35. Control Group • NORMAL situation – Group that DOES NOT receive experimental treatment, used for comparison. • Placebo Effect

  36. Constants / Controls • Things in an experiment that stay CONSTANT (don’t change) to be sure an experiment is fair.

  37. Simpsons worksheet • Complete the Simpsons scientific method worksheet. • This worksheet is due _______upon arrival to class.

  38. BELLWORK 10-8-10 • I want to see if a darker colored candle will burn faster. • What should my hypothesis be? • Set up an experiment to test this hypothesis.

  39. Bell work! • List the steps of the scientific method. • Scientific Method:

  40. How do scientists use statistics? • To explain, summarize, characterize, analyze and compare data.

  41. reminder • Control – does not receive experimental treatment • Independent variable-topic of interest that the scientist controls, doesn’t change • Dependent variable – depends on the topic of interest (independent variable) , changes

  42. Bell work • Compare and contrast independent and dependent variables.

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