Science project

Eating Light


  • Computer with Internet access     
  • Color printer     
  • Digital camera     
  • Typical office/hobby/hardware/craft supplies (paper, poster board, glue, etc.)
  • Fresh food samples (banana, avocado, tomato, potato, leftovers, etc. – Three samples of each type, all three samples as close to the same size as possible).
  • Three identical large bowls 


  1. Read overview of relevant topics (see bibliography below and terms listed above)
  2. Address all of the above terms and research questions.
  3. Search and print out interesting images relevant to your topic
  4. Take photographs throughout the course of the experiment.
  5. Split the food samples into three identical groups. Whole fruits work well for this project, but use your imagination.
  6. Place each group of foods in a separate bowl.
  7. Put one bowl into a darkened cupboard.
  8. Place another bowl on a kitchen counter or the top of the fridge.
  9. Leave the third bowl outdoors in partial sunlight
  10. Carefully record all observations as the days go by.
  11. Judge freshness by appearance, firmness, odor and coloring.
  12. Analyze your data.
  13. Interpret your findings in a detailed report.
  14. Include interesting photos, diagrams and food samples in your science fair display.
Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

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