He watched as tiny blue dots (water) began to shimmy across the membrane toward the left side. The green glucose dots, true to the rules, just bounced off the membrane like confused bees against a window. They were too large to pass.
“Okay,” Leo muttered, clicking the “Start” button on the Student Exploration: Osmosis simulation. “Time to see who moves where.”
Just like water.
He wrote: The outside has less water and more salt. Water leaves the vacuole. The cell membrane peels away from the cell wall. The plant wilts.
He had a PDF open in another tab—the dreaded Student Exploration Osmosis Gizmo Answer Key . His teacher, Ms. Albright, had posted it as a “study resource,” but Leo knew it was the Holy Grail for procrastinators. It contained all the answers: the “Prior Knowledge Questions,” the “Gizmo Warm-up,” and the five “Activity B” questions about water potential.