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Parents guide, Teachers guide

Below is a list of miscellaneous Free Science Fair Projects:

Make Electricity from fruits Electromagnet projects
Effect of Salt on Boiling Temperature of Water Do Detergents Affect Plant Growth?
Battery Power Electric Motor/ Generator
Wooden Generator Magnet Levitation
Steam Engine, Steam Boat Simple magnet Levitation
Clear or Opaque Do Plants grow better with sunlight or artificial light?
Do Cooked Beans Grow? Is plant growth affected by the amount of light received?
Make Electricity from a Potato Electricity and Conductivity Projects
What Foods Contain Starch What effect does music have on plant growth?
Water Electrolysis Will vitamins affect the growth of a plant?
Why Do Leaves Change Color in the Fall? How does table salt affect the boiling temperature of water?
Which Types of Food Mold the Fastest? Creating Your Own Water Cycle
How much water is in orange? Optical Instruments
For more project ideas, you can browse the projects listed below. These project ideas also have links to a page with the projects purpose, which maybe helpful for starting your project.
  Primary Projects (Grades 1 - 4) The following are display type projects suitable for beginners. Students should be encouraged to make personal observations rather than taking material out of a book or magazine
  Elementary Projects (Grades 4 - 6) Included are sample topics for making models or conducting demonstrations. These should be level 3 projects. Some personal input is needed to avoid just a display project
  Intermediate Projects (Grades 7 - 8) Topic Area: 
  Senior Projects Projects (Grades 9 - 12) Topic Area: 
Physical Science  
Earth Science / Meteorology  
Computer Science