Name: Date: Science Period Unit 2 Review: Graphing and Scientific Method Directions: In this section, you will plot and interpret a line graph. Larry, Deborah and Thomas helped Mrs. Messina determine the affect of study time on test scores. Below is the data they collected. Graph the data and then answer the questions below. The Effect of Study Time on Test Scores Title 2 point Study Time in Hours Test Scores in % Label axes 2 points 0 67 Scale/Interval 2 points.5 72 Plotting 6 points 1 79 Line 1 points 1.5 83 ~~~~~~~~~~~~~~~~~~~~~ 2 85 2.5 90 Show all interval work. Ix > Range > = # boxes Iy > Range > = # boxes
1. Based on the graph: As the study time increase, the test grade. 2. How long would you have to study to earn a 75%? 3. What is the dependent/responding variable in this experiment? 4. List 2 variables that had to be controlled. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Directions: Use your knowledge of graphing to answer questions 5-7. Base your answers on the following question: How does the number of snowboarders affect the amount of snow left on the trail? 5. What is the independent variable? 6. As the number of snowboarders increases, the amount of snow left on the trail. 7. Sketch a graphing relationship that demonstrates the statement. Identify the relationship: Direct Inverse Cyclic
Multiple Choice Identify the choice that best completes the statement or answers the question. 8. The horizontal axis of a graph runs a. left to right. b. up and down. c. vertically. d. diagonally. 9. Observations that deal with a number or amount are called a. manipulated observations. b. quantitative observations. c. qualitative observations. d. operational observations. 10. A possible explanation for a set of observations or answer to a scientific question is called a(n) a. prediction. b. hypothesis. c. theory. d. law. 11. During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the a. manipulated variable. b. responding variable. c. operational variable. d. dependent variable. 12. An organized way to collect and record scientific observations is with a(n) a. model. b. inference. c. data table. d. operational definition. 13. One useful tool that may help a scientist interpret data by revealing unexpected patterns is a a. variable. b. graph. c. theory.
d. law. 14. The factor that may change in response to the manipulated variable is called the a. hypothetical variable. b. responding variable. c. operational variable. d. independent variable. Short answer: Complete each question based on your knowledge of the Scientific Method Directions (15 and 16): 15. Jif brand peanut butter is tastier than Skippy brand. a. Is this testable? b. If it is not testable, re-write it as a testable question. 16. Monkeys prefer apples over bananas. a. Is this testable? b. If it is not testable, re-write it as a testable question. ****************************************************************************************************************** Directions: Write an appropriate hypothesis. ( remember: there are many right answers. You need to use the proper format.) 17. I went to start my car this morning and it didn t work. Why is my car not working?
Directions ( 18 and 19): For each situation, identify the variable(s) listed. 18. Nicholas and Matthew are planning an experiment to find out whether the shape of an container affected the volume of a liquid. Independent/Manipulating Variable: 19. Allison and Melissa want to know which brands of toothpaste caused the least number of cavities. Dependent/Responding Variable: 20. In Allison and Melissa s lab, what are two (2) variables they had to control? Controlling variable 1. 2.