Your student builds a working eardrum model using a balloon stretched over a clear cup, two craft sticks acting as ossicles, and a small bead as the stirrup, then holds it near a speaker to watch sound waves move every component. The sheet walks through six numbered build steps, six test conditions including volume changes and pitch comparisons, and four written observation prompts. Aimed at grades 4 to 6, it connects directly to a human body unit study by asking students to match each model part to its real anatomical counterpart.

This model of the ear vibrations lab works as a standalone one-day lesson or as the anchor activity inside a sound and waves unit. Completing the Think and Extend section, which asks why membrane tension affects bead movement and what happens when ear structures are damaged, demonstrates that your homeschooler can move beyond observation into mechanistic reasoning. A Name, Date, and For field at the top keeps it tidy inside any lab notebook or portfolio.