1. Environmental Unit 1- Principles of Science GRUDGE BALL

2. DO NOW Sarah bought a new car in 2001 for $24,000. The value of the car changed each year as shown in the table below. Make a graph from the following data.

3. QUESTION 1 In order for an experiment to be considered true science, it must _____________ a.Be reproducible b.Have a testable hypothesis c.Be peer reviewed d.All of the above are necessary

4. QUESTION 2 ____________________ appears or claims to be science, but does not follow scientific principles. Ex: horoscopes Answer: pseudoscience

5. QUESTION 3 What is the last step of the scientific method? a. Making observations b. Testing the hypothesis with an experiment. c. Asking a question d. Interpreting data and drawing conclusions.

6. QUESTION 4 Name the variable that we change in an experiment. Answer: Independent

7. QUESTION 5 What do we call the variables that are kept the same in an experiment? Answer: controlled variables

8. QUESTION 6 Scientist #1 is testing the effect of music type on the heart rate of his patients. He uses 6 men and 6 women in his study. Scientist # 2 is doing the same study with him. In her experiment she uses 30 men and 30 women. Which scientist’s results will be considered more accurate? Answer: Lady Scientist #2

9. QUESTION 7 _________________ are conducted in the field under normal circumstances. a.Controlled experiments b.Natural experiments c.Blind experiments d.Double-blind experiments

10. QUESTION 8 A __________ _____________ the experimental subjects do not know which is the experimental group and which is the control group. a.Controlled experiment b.Natural experiment c.Blind experiment d.Double-blind experiment

11. QUESTION 9 A _____________ _______________ prevents both the experimental subjects and the scientists from knowing which is the control or experimental group. a.Controlled experiment b.Natural experiment c.Blind experiment d.Double-blind experiment

12. QUESTION 10 This group in an experiment is exposed to the independent variable. Answer: Experimental group

13. QUESTION 11 Name the variable that we measure in an experiment. Answer: dependent variable

14. QUESTION 12 This group in an experiment is not exposed to the independent variable and is used to compare. Answer: control group

15. QUESTION 13 As the temperature of the water increased, what happened to the average water flea heart rate? Answer: increased

16. QUESTION 14 What day was the paramecium population the highest? Answer: day 2

17. QUESTION 15 Which temperature is the best for protein digestion? Answer: about 37 degrees Celsius

18. QUESTION 16 Which individual maintained higher blood glucose levels over time? Answer: individual 2

19. QUESTION 17 As the water temperature increases, what happens to the dissolved oxygen level? Answer: decreased

20. QUESTION 18 If someone were to consume 50 kg of sugar per year, how many teeth with decay would they probably have? Answer: about 3.5

21. QUESTION 19 What is the dependent and independent variable of this experiment? Answer: DV- flea heart rate, IV- water temp

22. QUESTION 20 What is the dependent and independent variable in this experiment? Answer: DV- # of individuals IV- # of days

23. QUESTION 21 What is the dependent and independent variable in this experiment? Answer: DV: amount of protein digested, IV- temp

24. QUESTION 22 What is the dependent and independent variable of this experiment? Answer: DV- blood glucose levels IV- time

25. QUESTION 23 What is the dependent and independent variable of this experiment? Answer: DV- level of dissolved oxygen IV- water temp

26. QUESTION 24 What is the dependent and independent variable of this experiment? Answer: DV- teeth decay IV- sugar intake

27. QUESTION 25 Construct a line graph with the following data: Average Carbon Dioxide Levels in the Atmosphere YearCO 2 (ppm) 1960320 1970332 1980350 1990361 2000370

28. QUESTION 26 Construct a graph with the following data: Lake pH Level YearpH Level 19806.7 19856.3 19906.4 19956.2 20005.9 20055.4 20105.1

29. QUESTION 27 Construct a graph from the following data: Blood Glucose Level Over Time Time (hours)Blood Glucose Concentration (mg/dL) 0100 4110 8128 1282 1692 20130 24104

30. QUESTION 28 Construct a graph from the following data: Shrew Population Over Time Time (yearsAverage Number of Shrews per Acre 15.0 27.5 319.0 423.5 5

31. QUESTION 29 Construct a graph from the following data: U.S Gasoline Prices: 1995-2005 YearCost per Gallon ($) 19550.27 19650.35 19750.51 19851.15 19951.20 20052.50

32. QUESTION 30 Construct a graph from the following data: Robin Population Over Time Time (years)Average Number of Robins per Acre 10 20.5 30.8 41.0 51.3