This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

This fascinating science fair project explores eye color genotypes.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

This science fair project idea measures physical dexterity as a function of temperature.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

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

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Learn how acid-base catalysis affects enzymes and enzymatic reactions in this science project.

The purpose of this science fair project is to determine whether Green Bags, with or without refrigeration, are most effective in preserving food.

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

The purpose of this science fair project is to learn which substance best preserves apples. Learn about enzyme interactions in fruit and scientific processes.

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 project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

This science fair project idea investigates whether plants can survive being frozen.

Look for correlation between pH values of commercial soaps and detergents and manufacturer claims about eye irritation hazards.

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

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Science fair project that examines learn how the angle of incidence affects the efficiency of solar panels. How does a solar cell work?

The objective of this experiment is to evaluate the effects of acid rain on plants.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This science fair project idea explores the different properties & interactions of sugar molecules.