This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

In this project, waves of vibrations are experimented with using water in glasses.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

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

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

In this science fair project, students make their own rain gauge to measure rainfall.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

Construct and experiment with a periscope using reflected light rays to gather an image.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

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.

In this experiment you will replicate the mummification process by making a hot dog mummy.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

The goal of this project is to create an exciting topographical map out of dough.

This science fair project idea determines what household items are good conductors of electricity.

In this science fair project, students create their own miniature salt flats at home.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

This science fair project idea determines what household items are good conductors of electricity.