Question

M.1: Introduction to Magretism 3. Consider bringing the tip of a nail up to each end of a compass. For each scenario outlined in (a) and (b) below, circle what you would observe when the tip of the nail is brought to each end of the compass: Tip to North Pole of Compass Tip to South Pole of Compass a. An unrubbed nail: \begin{tabular}{cc|cccc} Tip of nail to N pole of compass & Tip of nail to S pole of compass \\ \hline Attract & Repel \( \quad \) Nothing & Attract & Repel & Nothing \end{tabular} b. A nail is rubbed from head to tip with the north pole of a magnet: \begin{tabular}{|c|c|c|c|c|c|} \hline \multicolumn{3}{|c|}{ Tip of nail to \( \mathrm{N} \) pole of compass } & \multicolumn{3}{|c|}{ Tip of nail to \( S \) pole of compass } \\ \hline Attract & Repel & Nothing & Attract & Repel & Nothing \\ \hline \end{tabular} c. Describe your reasoning: My reasoming is that. 4. In a consensus discussion, a student asks the following question: I just don't understand why the rubbed nail pointing north means that the Earth is a magnet. Why couldn't these observations support the idea that the Earth is a nonmagnetized ferromagnetic material? a. How would you respond to this student? Use evidence to support your claims. b. Design an experiment to test this student's idea. Page 11

          M.1: Introduction to Magretism
3. Consider bringing the tip of a nail up to each end of a compass. For each scenario outlined in (a) and (b) below, circle what you would observe when the tip of the nail is brought to each end of the compass:
Tip to North Pole of Compass
Tip to South Pole of Compass
a. An unrubbed nail:
\begin{tabular}{cc|cccc} 
Tip of nail to N pole of compass & Tip of nail to S pole of compass \\
\hline Attract & Repel \( \quad \) Nothing & Attract & Repel & Nothing
\end{tabular}
b. A nail is rubbed from head to tip with the north pole of a magnet:
\begin{tabular}{|c|c|c|c|c|c|}
\hline \multicolumn{3}{|c|}{ Tip of nail to \( \mathrm{N} \) pole of compass } & \multicolumn{3}{|c|}{ Tip of nail to \( S \) pole of compass } \\
\hline Attract & Repel & Nothing & Attract & Repel & Nothing \\
\hline
\end{tabular}
c. Describe your reasoning:

My reasoming is that.
4. In a consensus discussion, a student asks the following question:
I just don't understand why the rubbed nail pointing north means that the Earth is a magnet. Why couldn't these observations support the idea that the Earth is a nonmagnetized ferromagnetic material?
a. How would you respond to this student? Use evidence to support your claims.
b. Design an experiment to test this student's idea.
Page 11

M.1: Introduction to Magretism
3. Consider bringing the tip of a nail up to each end of a compass. For each scenario outlined in (a) and (b) below, circle what you would observe when the tip of the nail is brought to each end of the compass:
Tip to North Pole of Compass
Tip to South Pole of Compass
a. An unrubbed nail:

Tip of nail to N pole of compass Tip of nail to S pole of compass

Attract Repel Nothing Attract Repel Nothing

b. A nail is rubbed from head to tip with the north pole of a magnet:

3|c| Tip of nail to N pole of compass 3|c| Tip of nail to S pole of compass

Attract Repel Nothing Attract Repel Nothing

c. Describe your reasoning:

My reasoming is that.
4. In a consensus discussion, a student asks the following question:
I just don't understand why the rubbed nail pointing north means that the Earth is a magnet. Why couldn't these observations support the idea that the Earth is a nonmagnetized ferromagnetic material?
a. How would you respond to this student? Use evidence to support your claims.
b. Design an experiment to test this student's idea.
Page 11

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