• What happens to a piece of bread forgotten in your locker?
• Which lasts longer, Duracell or Energizer?
• Why do people choke up on a bat?
• Is Bounty really the "quicker picker upper"?
• How can you tell if dice are "fair"?
• Is there a difference between different plant fertilizers?
• The effect of light, soil type, music, temperature, oxygen, or water on plant growth.
• The effect of oxygen (or carbon dioxide) on plant growth (enclosed system)
• Will cut flowers really last longer when the flower freshness packet is added to the water?
• Will cut flowers turn color if dye is added to the water?
• What is the effect of temperature on gas solubility (soda water)?
• What is the effect of seed treatment prior to planting (temperature, moisture, etc.)?
• What is the effect of temperature on the rate of a chemical reaction?
• What is the effect of salt on the freezing point of water. On the boiling point of water.
• How does the window in the car go up and down?
• What happens when I put a shell in vinegar? What happens to a rock? How about a penney?
• What is the effect of salt on the electrical conductivity of water.
• What is the effect of temperature on the solubility of salt (or sugar).
• What is the effect of temperature, light, moisture ... on the growth of bread (or cheese) mold.
• What is the effect of breathing changes, physical activity, eating, music... on heart rate.
• What is the effect of music on math scores.
• What is the effect of friction on the speed of an object.
• Does friction generate heat?
• Which gum holds its flavor longer?
• Do boys really like blue and girls really like pink?

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• What happens to a piece of bread forgotten in my locker? Is it different if the bread is in a paper bag, or a plastic one? Does the amount of moisture affect the results?
• Does "Dawn" clean more dishes than "Joy"?
• Do pendulums with different height strings — swing the same number of times? — go at different rates?

• How is current affected by the type of conductor, temperature, or filament.
• Will an electromagnet with more wires produce more field strength?
• How do fluorescent lights compare with filament bulbs, in effectiveness and cost?
• Which lasts longer, Duracell or Energizer?

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• What is the best design for a paper airplane?
• Does the weight or length of a pendulum affect its speed?
• What materials will sink or float in water? Why?
• Can I lift objects easier by using levers, pulleys?
• Sports:
  1. How does a ball bounce off of the wall? Can I measure the angle it hits and predict where it will go?
  2. How does a gymnast balance?
  3. Why do people choke up on a baseball bat?
• How do metals compare in conducting heat?
• How metals compare in density and buoyancy?
• How does the amount of oxygen affect the rate of burning?
• Does temperature affect solubility?
• Are some substances more soluble than others?
• What is the best wing shape for a paper airplane? Why?
• Compare densities of different gases — do balloon experiments with different types and amounts of gasses.
• How is light affected by passing through water — view objects under water, experiment with prisms, form of rainbows.

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• What are the effects of salts on the freezing point of water and other liquids ... why are roads salted in the winter?
• Will water freeze at different rates if it is mixed with other things (sugar, salt, pepper, soapy water ...)?
• Vinegar, oil, water ... what mixes, what doesn't? what floats, what doesn't?
• Effect of gluten on cookies ... try out different flours (cake, pastry, etc. ) and predict what will happen to the cookies.

• Record the length of days and nights over a period of time; what effects do the changes have on things like household plants, pets, etc.
• Is air in your house the same temperature at floor level and near the ceiling? How could you spread heat more evenly through the house?
• Does dew form on clear or cloudy nights? What other frost factors increase the amount of dew? Can you measure how much dew is formed in a square meter.
• How does the temperature change during the day? What time is usually the warmest? Can you construct your own thermometer to keep your own records.
• Is evaporation real? Can you demonstrate it? Is it a function of temperature?

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BIOLOGY:
Please keep in mind that one of the Ground Rules for the fair is no animals.

• How fast does my heart beat - when I'm lying down, sitting up, jogging, running?
• What happens to my pupils with different amounts of light?
• How are germs spread? Do people catch colds more at certain times of the year? Check in with your school nurse to see if she has a record of absences. Graph the absences by week, month. Is this what you expected?
• Make observations on the life cycle, feeding habitats, population, of various organisms; flies, bees, butterflies.

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• Roll a pair of dice 10 times. Sum and graph the results. Repeat this 20 time, then 50, then 100 times. Do you see a trend in your graph? Is this what you expected?
• Flip a coin and record the results. Repeat 10 times. Repeat 50 times. Compare your results. Is this what you expected?

• What is the effect of light on plants?
• What is the effect of pollutants in water — grow plants and use water that is pure and water that you contaminate with sugar of varying amounts, or with salt....
• What is the effect of different types of fertilizers on different types of plants?
• How does water travel through plants? Put celery sticks in water with different food coloring. See how it travels.
• Do earthworms play a role in the health of soil? Dig in areas where a garden was very successful and compare what you find in the soil to an area where even grass has a hard time growing? Try to keep all other conditions the same. If they are not, what role did these other conditions play?

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