2. By the end of this lesson you will be able to Analyze diffusion patterns to understand, manage, and predict movement. Acquire an understanding of the Nature of geographic diffusion: the different types of diffusion, the nature and behavior of diffusion waves and the factors that affect the speed and potential direction of diffusion patterns Recognize geographic diffusion patterns and how they affect the changing character of places over time. Copy the information on this slide into your notebook. >Click when ready<

3. Do you go to Walmart often? Have you noticed there is a Walmart just about everywhere? You often see a lot of “interesting” people at Walmart Read the following slide. >Click when ready<

4. Move you cursor over the picture. Hit the play button to start the animation. Watch the following animation then go to the next slide. >Click when ready<

5. In your notebooks- What are two things you noticed about the spread of Walmart here in the United States? Answer the following questions on your task sheet. >Click when ready<

6. Definition- The spread of ideas, disease, technology, people, or things from one place to another There are three types of diffusion Expansion Diffusion- spread outwards from a central location Relocation Diffusion-spread through the physical movement of people from one place to another Hierarchical Diffusion- spread from more important areas to less important areas Copy the information on this slide into your notebook. >Click when ready<

7. spread outwards from a central location The start of the spread of Walmart from the video is a great example How a rumor spreads is a great example of expansion diffusion Copy the information on this slide into your notebook. >Click when ready<

8. spread through the physical movement of people from one place to another A good example of this is the bird flu If you moved to a new school, you might introduce new ideas or trends in the new school Copy the information on this slide into your notebook. >Click when ready<

9. spread from more important areas to less important areas This diffusion is often how ideas and trends spread A great example of this is Rap music in the US Copy the information on this slide into your notebook. >Click when ready<

10. TASK 1: Come up with an example with your neighbors of a NEW example for each of the three types of Diffusion Be prepared to share with the class Explain why it fits with that particular type of diffusion Answer the following on your task sheet. >Click when ready<

11. This Graph is called an S-Curve, it shows how an idea, trend, disease, etc. diffuses over an area

12. West Nile is a virus that can infect humans, birds, horses, or any other warm blooded animals. People infected with West Nile Virus (WNV) sometimes show no symptoms. Others may develop fever, head and body aches, rashes, and swollen glands. 1% of those infected suffer from encephalitis, or swelling of the brain. This can be fatal WNV is not contagious (you can’t catch it like you catch a cold) Read the slide, then move on to next slide. >Click when ready<

13. West Nile is carried by Mosquitoes Getting bit by a Mosquito infected by West Nile can give you the virus Birds can carry the virus as well; an uninfected mosquito can bite an infected bird and later transfer it onto a human or other animal Read the slide, then move on to next slide. >Click when ready<

14. While Mosquitos only travel around one mile from where they were born, a huge number of birds migrate These bird migrations are a big factor in the spread of WNV Read the slide, then move on to next slide. >Click when ready<

15. 1937- Woman in Uganda found with the virus Read the slide, then move on to next slide. >Click when ready<

16. 1950-Virus spreads through much of Africa, the Middle East, Europe, and Asia Read the slide, then move on to next slide. >Click when ready<

17. 1999-First cases in the Americas appear in New York City. By the end of the year 7 people in the US were dead from the virus Read the slide, then move on to next slide. >Click when ready<

18. Since 1999, West Nile Virus has spread to most parts of the United States as well as parts of Central and South America Read the slide, then move on to next slide. >Click when ready<

19. You work in the marketing department of a research company developing a West Nile Virus vaccine You have been tasked with determining what places in North America will have the highest demand for the Vaccine You need to determine where the Virus has spread and what factors have affected its pattern of diffusion You need to determine if the West Nile Virus has been of the expansion, relocation, or hierarchical type. Read the slide, then move on to next slide. >Click when ready<

20. Look through the maps of human cases. Make sure you read the map keys and understand what the maps are showing you. Be sure to note how the number of cases increases from each map to the next Question 1: Keeping the concept of diffusion in mind, what pattern do you notice to the spread of the Virus? Question 2: What types of diffusion are you noticing on the maps? Where? Read the slide, then answer questions 1 & 2, using the maps on the next slide. >Click when ready<

22. Thinking back to the maps from Question 1, Question 3: Do you feel that areas with more people probably have more cases of the Virus? Question 4: What effect would more birds and more mosquitos have on an area’s infection rate? Read the slide, then answer questions 3 & 4. >Click when ready<

23. Look through this new set of maps. Instead of showing the raw number of infected, these maps show the number infected per 1 million people. Question 5: What differences do you notice from the first set of maps? Question 6: Do you notice an S-Wave pattern? Question 7: What areas do you notice are hurt more by the Virus? * You may want to refer back to slide 11. Read the slide, then answer questions 5-7, using the maps on the next slide. >Click when ready<

24. RAW Number VS. Rate Per 1 Million

25. Question 8: Now that you have examined the maps of the Virus Diffusion, where you feel the virus will spread to next? Draw on the map provided where you feel the virus will show up next Answer question 8 on your task sheet, then illustrate your answer on the map provided to you. >Click when ready<

26. There are more factors at work with West Nile than simple diffusion. Remember that birds are the number one carrier of the disease. Look at the map of American Crow breeding numbers. Question 9: What areas do you feel might be more or less impacted by West Nile from looking at this Map? Now look at the maps of mosquito activity. Question 10: What areas do you feel might be more or less impacted by West Nile from looking at this map? Read the slide, then answer questions 9 & 10, using the maps on the next slide. >Click when ready<

27. * Click on the map to advance to the next map. There are a total of 3.

28. Remember that mosquitos are limited by Climate. They do best in warm, wet climates. Examine the maps of rainfall and temperature Task 2: Show ON YOUR MAP what areas you feel can best support Mosquitos as well as what areas you feel cannot support Mosquitos. Be sure to label the areas. Read the slide, then complete Task 2, using the maps on the next slide as a reference. >Click when ready<

30. In paragraph form on your task sheet, answer the following set of questions- What areas are likely to be infected by WNV? What factors limit the spread of the virus? What area do you feel will receive the highest rate of infections and WHY?