Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

What is a series circuit and how does it work? Learn about voltage, electrical current, and resistors in this cool science experiment!

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Science fair project that determines whether mass and weight are the same or different.

The aim of this science fair project is to examine the differences between brands of bottled water and analyze consumer preferences through a taste test.

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

Science fair project that explores the variety of webs that spiders weave and collect specimens for identification.

This research project teaches students about synesthesia, a neurological condition that causes sensory overlap.

Science fair project that creates fog using bottles of hot and cold water.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

Science fair project that determines what neurons are, what they do and compiles this vital information in an illustrated book.

High school kids learn about fruit fly ethology in this cool lab that determines fruit fly movement and behavior under different conditions. Check it out.

Kids will make a homemade electroscope and explain how it detects static charges through induction in this fun science fair project idea.

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Consult mechanics, automotive specialists for advice. Build a real engine or a scale model. Test and demonstrate its mechanical properties.

Learn how the focal length of a lens affects a magnifying glass's magnifying power in this cool science fair project idea for 8th grade.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

This science fair project idea explores whether talking to a plant will help it grow.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

Explore the role of starches as thickening agents in food, and learn about the chemical properties of starch in the process.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Can playing video games trigger an adrenaline rush even though there's no real danger? In this cool experiment you'll learn all about how fight-or-flight works!

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.