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Remember, your science fair project should start with a question. What topic interests you most? What have you always wondered about that topic? Once you've decided the question you want to answer, everything from the hypothesis to the procedure will flow from there.


Animals and Insects

  • How does electricity affect fruit flies?
  • How do different types of liquids affect fruit-fly growth?
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Earth, Sun, and Stars

  • What evidence can we find about the rotation of the earth from star trails?
  • What is the size of the earth? (Eratosthenes method)
  • How does the color of a background affect its absorption of solar insolation?
  • How does sunspot activity affect radio reception?
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Food and Our Bodies

  • What are eating disorders? (research and survey)
  • Is there a relationship between eating breakfast and school performance?
  • On which foods does fungus grow best?
  • How does ethylene affect ripening fruit?
  • How are teeth affected by fluorides and acids?
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Oceans, Rivers, Streams

  • Does the amount of water affect the size of the wave?
  • How does the volume of a stream affect its flow rate?
  • Where is the current of a stream the fastest?
  • Is there a relationship between phases of the moon and our weather?
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Plants and Gardening

  • What kind of soil is best for water retention?
  • Will antacids help soil polluted by acid rain?
  • Does human hair affect the growth of plants?
  • How does a garden mist spray affect plant growth?
  • How does the duration of insolation affect plant growth?
  • What is the percentage of water in various fruits and vegetables?
  • Which plants and vegetables make the best dye?
  • Which type of wildflower grows best under artificial light?
  • How does temperature affect the water uptake in celery plants?
  • Does the type of water affect the growth of plants?
  • Is soil necessary for plant growth? (hydroponics study)
  • How does rotation affect plant growth?
  • Does music affect plant growth?
  • Does a plant grow best in sunlight or artificial light?
  • Can plants deprived of sunlight recover?
  • What is the relationship between root and stem growth?
  • How does gibberellic acid affect plant growth? (growth hormones study)
  • Which color of light causes green beans to grow best?
  • Can potatoes be grown without soil?
  • How do worms affect plant growth?
  • What is the effect of urine on grass?
  • What affect do Epsom salts have on plant growth?
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Water Quality

  • What is in our drinking water?
  • Are our local waters acidic?
  • Do our soils show the effects of acid rain?
  • What is the lime content of various samples of water?
  • How polluted is our water? (the trapping and study of bacteria with a Millipore filter)
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Weather

  • How can we prevent the weathering of our sidewalks and driveways?
  • How does topography affect weather conditions?
  • Does the topography of an area affect its local weather?
  • How do changes in air pressure affect the weather?
  • How are all weather factors related?
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Other

  • Are safe homemade cleansers as effective as commercial cleansers?
  • How does particle size affect settling rates?
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