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Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

In this experiment we will be determining whether birds prefer certain colors of seed.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

This project examines what types of objects burn and which burn faster and cleaner.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science fair project idea investigates the difference in reaction times between boys and girls.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Find out which type of sponge holds the most water.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

This science fair project idea examines the reason boats are shaped and engineered.

Check out this cool science fair project on identifying rocks and minerals for kids.

This science project allows students to study the psychology of happiness.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.