This lab not only solidifies the concept of density but allows student to determine density in multiple ways. It emphasizes measuring, graphing, data analysis and experimental design. A final component of the lab allows for students to design their own experiment for a more inquiry style learning.
After I designed this lab, I tried it out in my classroom. Many of my students had never seen the inquiry portion of a lab before and this was a great way to introduce experimental design and creative thinking to them.