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

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

This science fair project idea investigates the hardness property of minerals.

This science project teaches students to classify different shapes of leaves.

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

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

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

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

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.

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

This science fair project teaches students the differences between fruits and vegetables.

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.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

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.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

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.

This science fair project idea examines which type of insulation holds in the most heat.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This science fair project examines how seeds hitchhike on animals and clothing.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

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

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

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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

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