Objective The objective of this experiment is to visually demonstrate the fundamental process of photosynthesis in a simplified, controlled setting. Students will observe directly how a freshly picked botanical specimen interacts with essential environmental factors to produce visible gas. Scientific Principle Photosynthesis is the biological process by which plants capture energy from sunlight and use it to convert water and carbon dioxide into chemical energy and oxygen. When a living leaf is submerged in water and exposed to a direct light source, it continues to photosynthesize, releasing oxygen gas that becomes trapped as visible bubbles in the surrounding liquid. Materials List * One freshly picked, healthy green leaf (an active biological specimen) * Clear tap water * A strong, direct source of sunlight * One clear glass bowl or cup (to contain the water and leaf) * One small, clean stone (to act as a weight) Step by Step Procedure * Fill the clear glass bowl or cup with room-temperature tap water until it is approximately three-quarters full. * Select and detach one healthy, green leaf from a living plant, ensuring it is freshly picked for maximum cellular activity. * Place the freshly picked leaf into the clear container, fully submerging it beneath the surface of the water. * Position the small, clean stone gently on top of the submerged leaf to prevent it from floating to the surface. * Move the clear container to a location that receives uninterrupted, direct sunlight, such as an outdoor table or a bright windowsill. * Leave the experimental setup completely undisturbed in the direct sunlight for a duration of thirty to sixty minutes. * Closely inspect the surface of the submerged leaf and the surrounding water to identify the formation of small gas pockets. Expected Outcome After the designated waiting period, numerous tiny bubbles will be visible accumulating along the edges and the flat surface of the submerged leaf. These bubbles consist of oxygen gas, which serves as direct visual evidence that the leaf is actively undergoing photosynthesis by utilizing the provided water and sunlight.