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Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

This science fair project idea determines what factors influence an individual's reaction time using a web-based timed reaction test.

Test whether cutting up meats will make it cook faster than just cooking it whole.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

If your Father's Day festivities include meeting up with extended family, why not put all the dads to the test with a chili cook-off?

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

Formulate a hypothesis and use the scientific method to determine the guess what is hidden in a box. Test abilities of volunteers, without opening box.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

Science fair project that tests how heat affects the chemical reaction between a seltzer tablet and a glass of water.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

Help your child get comfortable with the concept of estimation, which will come in handy during everything from standardized tests to future shopping trips!

This experiment investigates if stress alters body temperature.

This experiment evaluates if the temperature of the environment that you work in affects your ability to perform mental tasks.

In this science fair project, students will use methylene blue to study the presence of aerobic bacteria in milk.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

In this science fair project, students examine how temperature affects sugar transport within a plant.

Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Evaluate whether people can raise the temperature of their finger using the power of their thoughts.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

This activity with add some fun and education to long car trips. Perfect for family vacations!

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

The objective of this project is to examine the ways in which a passive solar house may contribute to conservation of energy.

When your child is itching for a game, consider ditching Hide and Seek in favor of Shape and Seek. Here's how it works:

Can cells be frozen? This science fair project provides information to answer this question.

This study observes plants, insects and an animal living in proximity to a known source of EMF.

Start the new year with this fourth grade math "Calculation Challenge!"