Your student weighs three potato slices before placing each one into a labeled cup of plain water, low-salt solution (3%), or high-salt solution (10%). After 60 minutes at room temperature, they re-weigh each slice and record both the mass change in grams and the appearance and texture in the observation column. The sheet walks grades 5-8 homeschoolers through a full scientific method cycle, from writing a hypothesis through answering five analysis questions that ask them to compare results and predict what a stronger salt concentration would do.

Observing osmosis with potato slices fits naturally into a cell biology unit study or a broader life science sequence covering membranes and diffusion. It works as a standalone one-session lab or as a companion to a lesson on concentration gradients. By the time your student writes the conclusion paragraph at the bottom of the sheet, they have gathered evidence, explained a mechanism, and connected their data to the definition of osmosis printed in the reminder box.