how to make photosynthesis working model for science exhibition | diy

Creating a working model of photosynthesis using LED light as the sun and a real plant with cardboard/color paper as the base is a great way to demonstrate this biological process.

photosynthesis working model for science exhibition | diy
photosynthesis working model for science exhibition | diy

Here’s a step-by-step guide to help you build your model:

Materials needed:

  1. A potted plant (a small potted plant like a young seedling would be ideal)
  2. LED light (preferably a white LED light or a light with a spectrum that includes blue and red wavelengths for better photosynthesis)
  3. Cardboard or color paper (for creating the base)
  4. Scissors
  5. Tape or glue
  6. Marker pen or other decorating materials (optional)


  1. Prepare the base:
    • Take the cardboard or color paper and cut it into a suitable size and shape to act as the base for your model. It should be large enough to hold the potted plant and the LED light comfortably.
  2. Set up the LED light:
    • Place the LED light source above the cardboard base to simulate the “sun.” You can tape or glue the LED light in a fixed position so that it shines down on the plant consistently.
  3. Position the potted plant:
    • Carefully place the potted plant on the cardboard base, ensuring that it receives the light from the LED in a similar manner as it would in nature.
  4. Observe and explain:
    • Turn on the LED light to start the simulation. You can leave it on for a certain period each day to demonstrate how plants photosynthesize in the presence of light.
    • Observe the plant’s response over time. The leaves should begin to absorb light, and you may even notice changes in the plant’s growth and color.
  5. Explanation:
    • Use this working model as an opportunity to explain the process of photosynthesis to others. You can emphasize the following points:
      • Photosynthesis is a process where plants convert light energy from the sun into chemical energy in the form of glucose, which they use as food.
      • The LED light is a substitute for the sun in this model, providing the necessary light energy for photosynthesis.
      • Chlorophyll, present in the plant’s leaves, is responsible for capturing light energy and initiating the photosynthesis process.
      • Carbon dioxide from the air enters the plant through tiny pores called stomata on the leaves. Water is also absorbed through the plant’s roots.
      • The plant combines carbon dioxide and water in the presence of light to produce glucose and oxygen. Oxygen is released back into the air through the stomata.
  6. Decorating (optional):
    • If you like, you can decorate the cardboard base and create a simple landscape to enhance the visual appeal of your model. Draw or add cut-outs of other plants, flowers, or natural elements to make it more engaging.

Remember to take care of the real plant throughout the demonstration, providing it with proper sunlight and water to keep it healthy.

Step by Step Guide on Making of photosynthesis working model for science exhibition

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