5-min Experts: Data Collection and Analysis 2010 KSTA Conference Lisa Devillez Marshall County High School
Integrating Data Collection and Analysis into Intro. Science Courses • ACT Science Reasoning skills • Maintain / motivate an interest in STEM related careers • Prepare for success in honors and AP science and math
Resources for ideas… • Science Olympiad Events • Wind Power • Experimental Design • Disease Detectives • Young Epidemiology Scholars • Case Studies
Epidemiology • Epidemiology (data collection and analysis, statistics, percents, ratios) • Frequency • Association • Causation
Disease Outbreak Investigation The local health department was notified of a potential food borne outbreak of gastroenteritis in Greenport, and the epidemic team, including a medical epidemiologist, a microbiology technician and a nurse, visited the local hospitals to interview the attending physicians, the patients and some of their relatives.
Epidemic investigators gather data to define the distribution of the disease by: • time (onset time and epidemic curve), • place(potential places where the implicated meal was served such as cafeterias, restaurants and picnics), and • person(the distribution of the disease by age, gender and food items eaten).
The findings of the initial investigation included the following information.
Terminology Attack Rate (per 100) = (illnesses) / (exposed population) x 100 Relative Rate (Relative Risk) = (rate for most exposed population) / (rate for least exposed population)
Important note: None of the kitchen personnel were ill. The names of the kitchen personnel and their participation in the food preparation are as follows: • Manuel prepared the beef burritos and the potatoes, • John prepared the salad and the fruit, • Sally served all dishes except the ice cream, • Jane prepared the cheeseburgers and served the ice cream. The ice cream was a commercial brand and was bought at a nearby supermarket.
The laboratory confirmed that Salmonella toxin was present in some of the food samples and that one of the kitchen personnel of that place had the same Salmonella species. Furthermore, the Salmonella species found in the food and the kitchen worker was the same species found in stool samples of the patients. John was very likely to be responsible for the outbreak
Reaction Rate SC-HS-1.1.6 Students will: • identify variables that affect reaction rates; • predict effects of changes in variables (concentration, temperature, properties of reactants, surface area and catalysts) based on evidence/data from chemical reactions. • Rates of chemical reactions vary. Reaction rates depend on concentration, temperatureand properties of reactants. Catalysts speed up chemical reactions. DOK 3
Reaction Rate with a Catalyst • Access Excellence: Decomposition of H2O2 (catalase)