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How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Measure the porosity of rocks by submerging them in water. Measure how much water each rock "drank," by measuring the difference in water volume.

Test the placebo effect in different groups of people.

In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Explore the belief in astrology as a predictive system.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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.

Explore the wattage of microwaves in relevance to cooking time.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This biodiversity project examines the biodiversity in your own backyard.

Is there really such a thing as healthy gum? Students will learn what factors in chewing gum contribute to healthy teeth in this exciting science fair project.

Determine if it is easier to memorize colors, words, words in phrases, pictures or numbers. Determine at when retention rate in each category is the best.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

How is NASA able to launch something into orbit around the Earth? Learn about the relationship between gravity, speed, and orbit in space in this cool project!

Explore the neural and mental mechanisms at play in mental imagery.

This science fair project idea identifies and understands adaptations in birds.

In this experiment you will evaluate whether praise improves athletic performance.

Why does purple cheese look nasty? Because color plays a big part in how we perceive the taste of different foods. Are birds just like us in this respect?

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This project examines how temperature affects the volume of gas in balloons.

What does yeast eat? Sugar, of course. But yeast also has some powerful enemies in the form of antifungal agents! Kids test them out in this fun yeast lab.

In this science fair project, students investigate how different colors influence appetite.

Science fair project that illustrates the properties of black holes in space.

Science fair project that examines the biodiversity of ant populations in various locations.

This science fair project idea studies the differences in gender perception between people.

This science fair project idea examines whether boys and girls differ in reflexes.