Science project

Which Bread Molds the Fastest?


  • Five plates
  • Slice of white bread
  • Slice of wheat bread
  • Slice of rye bread
  • Slice of bread made from rice flour
  • Slice of homemade bread (like this)
  • Teaspoon
  • Water
  • Journal
  • Camera


  1. Create a chart in your journal with the breads and the ingredients in each.
  2. Place a slice of bread on its own plate, and sprinkle a teaspoon of water on each sample. Make sure the slices are equally damp, but not soggy.
  3. Place all five plates in a warm, dark place where they won’t be bothered (like an empty cabinet) and keep some distance between the samples. Don’t let the plates touch.
  4. Take a photo of each sample on its first day.
  5. Leave the samples overnight.
  6. The next day, note any changes in your science journal, and take another photo of each sample.
  7. Then sprinkle on some more water to keep the samples moist.
  8. Repeat steps 6 and 7 for one week. Remember to take careful notes about the mold, like how much mold is growing, and what color and shape it is.
  9. After taking your last photos on day seven, throw away all your bread samples.
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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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