The relationship between light intensity and the rate of photosynthesis Investigate the relationship between light intensity and the rate of photosynthesis. Photosynthesis is important because animals eat food, as it is a source of energy. All living things require a constant supply of energy to grow, reproduce, or move. Plants do not eat food but have some in the form of starch in their leaves. The symbolic equation of photosynthesis is: 6 CO2+6 H2O-light C6 H12 06+6 02. There are four substances necessary for photosynthesis to occur: -Carbon dioxide.-Chlorophyll.-Oxygen.-Sunlight. Photosynthesis does not it can occur without the presence of all four of these substances. Since light is the factor I am exploring in this investigation, this is the main factor I am examining. Plants need light for photosynthesis to take place; photosynthesis will not take place in the dark. It is true that the brighter the light, the greater the rate of photosynthesis. Many plants have leaves spread out so that each leaf receives as much light as possible and the lower leaves are not shaded by the upper leaves. I am studying the effects of light on the rate of photosynthesis. You can do this by measuring the rate of photosynthesis at different light intensities by counting the number of gas bubbles emitted by the plant in a given time. To make the test fair I will use the same quantity of water and the leaves of the same plant.[IMAGE][IMAGE] [IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE ][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE][IMAGE] ][IMAGE________________________________________________________________ IMAGE][IMAGE]Tube light================= ========================= ============= ========================= ============= ========================= ============= ========================= ============= =======FunnelBeakerplasticinepond weedMethod. I can do this by setting the diagram above. You need to take a glass and place two pieces of plasticine inside to hold the funnel. Then place the weed inside the funnel. Put a test tube