Small magnet: The best value is 31 mm and the uncertainty is 2 mm.

Thus, the true value is probably within the range between 29 mm and 33 mm.

1. 2.What claim can the team make regarding how the strength of the large magnet compares to the strength of the medium magnet?
2. 3.What claim can the team make about how the strength of the medium magnet compares to the strength of the small magnet?

Participate in a class discussion about the answers to these questions.

STEP 9 Now look over your team’s own data. Rank the magnet strengths by using the terms strongest, middle, or weakest. If your data does not support the claim that one of the magnets is stronger than another, then give them both the same ranking. (In that case, you would not use the middle ranking.)

Record the rankings in Table 1 on your record sheet.

STEP 10 Post your team’s rankings for the magnets in a class data table.

Make Sense of Your Ideas
Make Sense of the Experiment

Examine the class data table.

1. 1.Write your conclusion for the experiment by completing the following sentence on your record sheet:

 As the size of the magnets used in this experiment increases, the strength of the magnets _____________ (increases, decreases, does not seem to depend on size).

Complete a Team Skills Chart like the one shown below. For each team member write “yes” or “no” in each cell depending on whether she/he did what is stated. Do this on your own. Then compare your ratings with other team members.

Participate in a brief class discussion about the conclusion for the experiment. Your teacher will also lead a class discussion about how teams can work together effectively.