Answer
Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane. The particle theory of matter states that all matter is made up of particles that are in constant motion. The selectively permeable membrane in this experiment is the potato strip. In beaker A (distilled water), the area of high concentration of water molecules is inside the potato strip and the area of low concentration is outside the potato strip. The water molecules move from the area of high concentration to the area of low concentration, causing the potato strip to swell. In beaker B (salt solution), the area of high concentration of water molecules is outside the potato strip and the area of low concentration is inside the potato strip. The water molecules move from the area of high concentration to the area of low concentration, causing the potato strip to shrink. In beaker C (sugar solution), the area of high concentration of water molecules is outside the potato strip and the area of low concentration is inside the potato strip. The water molecules move from the area of high concentration to the area of low concentration, causing the potato strip to shrink.