Middle School (6th, 7th, 8th Grade) Science Fair Projects Ideas
http://www.education.com/science-fair/middle-school

• Hydroponics: The Growth of Plants in a Nutrient Solution Without Soil
• Ohm's Law: Running into Resistance
• Yeast's Effect on Sugar
• What's the Best Way to Destroy Fridge Odors?
• What Is the Most Efficient Substance for Melting Ice?
• Phototropism: Plant Movement in Different Light Intensity
• Is Sensitivity Heightened on Your Dominant Side?
• Fun Facts of Polar Bears
• Oil Spills and Wildlife: The Effect of a Surface Lipid Layer on Organism Survival Rates
• How Does Temperature Affect the Stretch of Rubber Bands?
  

Grade 7 Science Fair Project Ideas and Project Examples
http://www.projects.juliantrubin.com/science_fair_project/7th_grade.html

• The effect of sleep amount on learning and academic performance 
• Does aerobic exercise improve cognitive function? 
• Does an electric toothbrush remove more plaque than a manual toothbrush?
• How accurately the egg producers measure their eggs? 
• Statistically analyze the best picks for a playoff hockey pool. 
• Variable values change effect on the fractal Mandel equation calculation time 
• Genetic and Pathogenic Variation among Ascochyta rabiei (a chickpea disease).
• Investigation of Absorbing Impact Forces in a Hockey Helmet 
• Which Bridge Will Support More Weight: Beam, Arch Bridge or Suspension Bridge?
• Find the amount of ground-level ozone near your home.
• Effect of an Oil Water Separator's Shape on Its Effectiveness 
• How do oil spills affect plant growth? 
• The Effect of Water Acid Levels on the Growth of Radishes
• Determine the effect of different water pollutants on corn.

8th Grade Science Fair Projects
http://www.projects.juliantrubin.com/science_fair_project/8th_grade.html

• Examine Yellowstone's fascinating and explosive volcanic history
• Build a browser programmed with Visual Basic 
• How email works? 
• How does fabric softener affect the flammability of different fabrics?
• Do plants grow faster or slower in soil without microorganisms? 
• The Effects of Antioxidants and Free Radicals on Seed Germination
• Investigate The Venus Fly Trap - a carnivorous plant that eats insects
• How to decrease pesticide use and runoff 
• The Effects of Potash Tailings on the Growth of Barley and Flax
• Find out which kind of flower will last the longest in fertilized and non-fertilized water.
• How do diatom reproduction react to variable amounts of light? 
• Will stem rot disease lower the pH level of plants? 
• Why is The Sky Blue? 

High School Science Fair Projects
http://www.projects.juliantrubin.com/science_fair_project/high_school_projects.html

• Neem tree extracts as antibacterial, antifungal and pesticidal agents 
• The Effectiveness of Cholesterol Lowering Home Remedies Compared to Medication 
• Improving Efficiency of Organic Solar Cells Using Lead Phthalocyanine 
• A theory for describing the quantum mechanics of gravity 
• The Utilization of Gold Nanoparticles for the Treatment of Malignant Prostate Cancer Cells 
• Determine the mechanism by which cancer cells resist cisplatin 
• Investigate why the common household mold causes asthma 
• Prosthesis with direct interface with brain using electroencephalography (EEG) 
• A device capable of filtering out carbon dioxide from car exhausts
• The efficiency of different cement composites in concrete for waste and pollution reduction 
• Energy saving at home - the thermal envelope 
• Improvement of the speed and safety of sailboats using canting keels 
• Power Line Voltage Regulator 
• Typing Biometrics 
• A C# program that analyzes how does a cellphone conversation effect us while we drive
• Are dandelions able to inhibit bacterial growth and have other health benefits?
• The Chances of Guessing Correctly on a Multiple Choice Exam 
• A molecular, chemical and genetic assessment on the diversity of 16 faba bean lines.
• Investigate how cell phone radio-frequency waves affect the lifespan of a cricket. 
• Effect of fine and coarse concrete aggregate and size on groundwater pollution 
• Investigate change in water temperature as a result of El Nino 
• What hand cleaner will do the best job to clean our hands?