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Photosynthesis in Action Experiment

(Source: Wonders of Our World, W.O.W., The Ohio State University)

This experiment shows us that plants use water and carbon dioxide during the process photosynthesis. Here is an experiment that shows photosynthesis in action. We will see that during the day green plants take in water and carbon dioxide and use sunlight to change them into food.

You will need:
  • Bowl of water
  • Index card
  • Water
  • Pondweed
  • Jar
  1. Put the pondweed in the jar. Fill the jar with water
  2. Hold the index card over the top of the jar. Flip over the jar and submerge it in the bowl of water. Make sure there is no air in the jar.
  3. Place the jar and bowl where it will get a lot of light.
  4. Bubble appears on the leaves of the pondweed and rise to the top of the jar.
The bubbles are oxygen that forms when water and carbon dioxide are changed into food. We can observe a plant's food-making process, photosynthesis.
Ohio Governor’s Residence and Heritage Garden
358 North Parkview Ave., Columbus, Ohio 43209
Phone: 614-644-7644 Fax: 614-252-7076