A student investigated some properties of lead and recorded the findings in the table below.
\begin{tabular}{|l|l|}
\hline \multicolumn{1}{|c|}{ Property } & \multicolumn{1}{c|}{ Observation } \\
\hline color & dull gray \\
\hline density & $11.3 g / cm ^3$ \\
\hline volume of sample & $3.00 cm ^3$ \\
\hline melting point & $327^{\circ} C$ \\
\hline reaction with air & lead oxide forms on the surface \\
\hline electrical conductivity & conducts some electricity \\
\hline \hline
\end{tabular}

Which statement is true with respect to the investigation?
The student investigated only the physical properties of lead.
The student investigated only the chemical properties of lead.
The student investigated more physical properties than chemical properties of lead.
The student investigated more chemical properties than physical properties of lead.