Chapter 1 – Lesson 4: Jumping Jack Experiment

1. Chapter 1 – Lesson 4: Jumping Jack Experiment Objective: Learn how to make and analyze line graphs

2. The Experiment requires 4 people: • A Jumper (to do the jumping jacks) • A timer ( to keep track of the time) • A counter (to count the jumping jacks ) • A Recorder ( to write down the number of jumping jacks ) As a group, decide who will do each task. Prepare a table for recording the total number of jumping jacks after every 10 seconds, up to a total time of 2 minutes or 120 seconds.

3. Here’s how to do the experiment: • When the timer says, “go”, the jumper begins doing jumping jacks. • The counter counts the jumping jacks out loud. • Every 10 seconds , the timer says, “TIME!” and the recorder records the total number of jumping jacks the jumper has done so far. • Repeat the experiment (if you have time.)

4. Making the Line graph Step 1: Select 2 variables. • For example, in the JJ experiment the two variables are time and number of jumping jacks. Step 2: Select a scale and interval for each axis. • For each axis, you need to determine the largest and the smallest values you want to show on your graph and how you want to space the scale intervals. • In the jumping jack experiment, the values for time are between 0-120 seconds. Since you collected data every 10 seconds, you could place numbers at 10 second intervals.

5. Step 3: Plot the data points. • To plot the information, start at 0 on the X-axis and 0 on the y-axis. • Make a point where the two lines meet (intersect). • When you are done plotting the points, connect the dots with a ruler.

6. Example of Line Graph:

7. HOMEWORK: • Make a LINE graph of your jumping jack data. ( Example shown in slide 6.) • What does your line graph show about the jumping jack rate ( number of jumping jacks every ten seconds) as time passed? (Be specific.) • Is the relationship you found between the number of jumping jacks and the time, easier to see in a table or the graph? Explain your answer.