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yes, iodized does
Science Fair: Preserving Foods
Science Fair: Will Some Colors Keep You Cooler than Others?
Science Fair: How to Stop Soda From Exploding
Which cut flower lasts the longest? Great for grades K-5.
Do some liquids expand more than others when frozen?
Are all sugars the same? Find out if table sugar is the same as sugars found in honey/fruit juice. Great for middle school.
Science Fair: What's the Best Way to Stop Cut Fruits and Vegetables from Turning Brown?
Does age affect the ability to remember? Great for elementary school.
Science Activities: Make a Homemade Thermometer!
science fair idea