The cumulative cases stayed stable until 1980, then they began (and continued) to rise. 5. How did the house spray rates change from 1955 to 1995? The house spray rates stayed between 8,000,000 and 10,000,000 cases until 1975, when they dropped dramatically. They stayed around 2,000,000 cases from the early 1980s to 1990, when they disappeared altogether. 6. What can you determine is the relationship between the cumulative cases of malaria and house spraying rates? As the house spray rates decrease, the cumulative malaria cases increase. Insecticide-treated mosquito nets are also used to combat malaria. These nets form a protective barrier around sleeping humans by killing mosquitoes and other insects. The table below shows the percentage of people affected in areas with treated nets and untreated nets. Use the table below to answer question 7. Study Area Treated Nets No Nets Cameroon 18% 28% Sierra Leone 33% 46% 7. How does having treated nets affect the number of individuals affected with malaria? Treated nets decrease the number of malaria cases in individuals. 8. How would spraying houses with insecticide affect the abiotic factors in a local environment? Spraying houses releases insecticides, changing the composition of the air in local environments. 9. Would treated nets have the same effect? No, because treated nets do not release chemicals into the air. 10. If you had to choose between spraying your house with insecticide or using insecticide-treated nets, what would you choose? Why? in some way to their previous answers. Students’ answers should relate
The cumulative cases stayed stable until 1980, then they began (and continued) to rise. 5. How did the house spray rates change from 1955 to 1995? The house spray rates stayed between 8,000,000 and 10,000,000 cases until 1975, when they dropped dramatically. They stayed around 2,000,000 cases from the early 1980s to 1990, when they disappeared altogether. 6. What can you determine is the relationship between the cumulative cases of malaria and house spraying rates? As the house spray rates decrease, the cumulative malaria cases increase. Insecticide-treated mosquito nets are also used to combat malaria. These nets form a protective barrier around sleeping humans by killing mosquitoes and other insects. The table below shows the percentage of people affected in areas with treated nets and untreated nets. Use the table below to answer question 7. Study Area Treated Nets No Nets Cameroon 18% 28% Sierra Leone 33% 46% 7. How does having treated nets affect the number of individuals affected with malaria? Treated nets decrease the number of malaria cases in individuals. 8. How would spraying houses with insecticide affect the abiotic factors in a local environment? Spraying houses releases insecticides, changing the composition of the air in local environments. 9. Would treated nets have the same effect? No, because treated nets do not release chemicals into the air. 10. If you had to choose between spraying your house with insecticide or using insecticide-treated nets, what would you choose? Why? Students’ answers should relate in some way to their previous answers.