Designed for grades 6-8, this homeschool worksheet walks your student through a hands-on investigation into how phospholipids self-organize in water to form the structure that governs what enters and exits a cell. The sheet opens with a guiding question and a fill-in hypothesis, then moves through a seven-step procedure: filling a shallow dish with water, adding optional food coloring, sprinkling phospholipid model pieces onto the surface, and observing how the hydrophilic heads and hydrophobic tails arrange themselves. A labeled diagram on the sheet identifies both parts of a phospholipid so your student can connect what they see in the dish to the biology vocabulary. An open observations box asks them to draw what they see, and four analysis questions probe how the heads and tails behaved differently.

The cell membrane model with phospholipids fits naturally into a cell biology unit study, sitting well after a lesson on cell structure and before deeper work on membrane transport. Completed independently, it demonstrates that your student can form a testable hypothesis, follow a multi-step lab procedure, and draw evidence-based conclusions. The conclusion section ends with an “I learned that” prompt, giving younger or less confident writers a low-stakes entry point into scientific writing.