Scientific Method Study Guide Write a hypothesis for each of the following research problems. Identify the dependent and independent variable for each. 1. What effect does high temperature have on plant growth? a. ____If the temperature increases, then plant growth decreases.___ b. Independent variable:___Temperature_____ c. Dependent variable:____Growth__________ 2. What effect does studying with music have on student test scores? a. ______If student listen to music while studying, then they will receive better test scores. ______________________ b. Independent variable:______Music__________ c. Dependent variable:_______test scores______ 3. What effect does smiling have on teacher giving no homework? a. _______If students smile at teacher, then no homework will be assigned. _____________________________________ b. Independent variable:_____Smiling___________ c. Dependent variable:______Homework___________ Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. 4. What was the initial observation? Shower covered in green slime 5. Control Group: Side of shower sprayed with water. 6. Independent Variable: Coconut juice 7. Dependent Variable: green slime 8. What should Homer's conclusion be? It doesn't work Krusty was told that a certain itching powder was the newest best thing on the market, it even claims to cause 50% longer lasting itches. Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the Experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported to have itches for 45 minutes. Identify the­ 9. Control Group: Group A 10. Independent Variable: New itching powered 11. Dependent Variable: Minutes 12. Explain whether the data supports the advertisements claims about its product. Yes the data supports the ad. 13. ____Observation_________usually involve using the senses to gather information about events or processes. 14. ___Interence____ a logical interpretation based on prior knowledge or experience. 15. _____Independent_______ Variable: variable that is changed. 16. _____Dependent_____ Variable: variable that is observed. 17. What are the 5 key areas for a conclusion? a. ______Purpose__________ b. ___Restate Hypothesis____ c. ___Analize Data_________ d. ___Support/Reject Hypothesis___ e. ___Scientific Explanation___ As the pH ___Decreases_______, The ____Bananas________ makes the number of tadpoles up the largest percentage of all _Increase then decreases___. the fruit. ___New York_____ had the highest average rainfall. Overall, as the number of days ___increase__, the temperature in Celsius _increase__.