4th - 7th Grade Engineering and Science Inquiry Science Projects

Will the shape of an ice cube impact how fast the ice melts?

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Take a dive into the candy jar with this yummy science experiment.

This science fair project idea experiments with spinning color wheels and optical illusions.

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

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

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

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

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

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This science fair project idea produces varying pitches of sound.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.