Your teacher will score this activity using the following scale (unless your teacher provides you with a different scoring scale):
Task 1: Gravitational Force Fields Task Points:
25 a. Pick up and drop several different objects. 5 b. Explain whether the investigation gives evidence that a gravitational force field exists. 10 c. Describe how someone might dispute the results of the investigation. 5 d. Suggest improvements to the investigation design or procedures. 5
Task 2: Electric Force Fields Task Points: 30 a. Compare balloons that have the same charge, and observe how they interact. 5 b. Compare balloons that have different charges, and observe how they interact. 5 c. Explain whether the investigation gives evidence that electric force fields exist. 10 d. Describe how someone might dispute the results of the investigation. 5 e. Suggest improvements to the investigation design or procedures. 5
Task 3: Magnetic Force Fields Task Points: 45 a. Verify that the magnet and the compass are both magnetic and that they interact. 5 b. Map the magnetic field around the bar magnet. 20 c. Explain whether the investigation gives evidence that magnetic force fields exist. 10 d. Describe how someone might dispute the results of the investigation. 5 e. Suggest improvements to the investigation design or procedures. 5