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Which paper towel is the strongest?
Which paper towel absorbs the most water?
How strong are plastic wraps?
Which brands of Ziploc bags are airtight?
Do traffic lights change quicker if pressed repeatedly?
Which rug cleaner cleans best?
Which laundry soap cleans best?
Which battery lasts the longest?
Are “natural” cleansers as effective as commercial cleansers?
Which Tile Cleaner Removes Soap Scum the Best?
How does PSI affect the bounce of a basketball?
How does temperature affect the bounce of a tennis ball?
Do aluminum bats work better than wooden bats?
Does spinning a football make it go further in the air?
Do tennis balls loose their bounce?
What citrus fruit makes the best battery?
What amount of glycerin makes the best bubble?
What conditions promote rust?
What factors affect burning?
How can a period of a pendulum be increased?
Can eggs withstand a greater force from one direction than from others?
How can power be increased?
How can you keep avocados from turning brown?
How does salt affect water density?
How strong are nylon fishing lines?
How can a period of a pendulum be increased?
Can eggs withstand a greater force from one direction than from others?
Which homemade airplane design flies best?
Which type\size of light bulb produces the most light?
Which materials can be charged with static electricity?
What affects light reflection?
What color effects temperature?
What is the best design for a bridge?
How does temperature affect the stretch of a rubber band?
How do knots affect the strength of a rope?
Which type of lawn sprinkler works best?
Do nicked beads germinate faster?
Does sugar water extend cut flower life?
Which fertilizer makes plants grow healthier
What effect does oil have on water plants?
What materials break down faster in soil?
How do different surfaces affect the amount of sunlight reflected and
absorbed?
How do different surface types effect surface temperatures?
Does fresh water hold heat longer than salt water?
What is the difference between direct sun and in the shade? Is the difference
constant?
What factors affect the cooling of land?
Which affects the rate of evaporation most- temperature, humidity, wind
speed or other factors?
What is the best design for wind or water generators?
What is the most accurate way to measure the size of the earth?
Where is the current of a stream the fastest?
What kind of soil is best for water retention?
What type of water makes the best crystals?
Does the duration of an earthquake effect how much damage is done?
What type of shaking produces the most damage (side to side/up and down/compression)?
Who has the fastest reaction time? (boys/girls,
older/younger)
Does sight effect taste?
Does sight effect hearing?
Does smell effect taste?
Who has the best peripheral vision? (boys/girls, older/younger)