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

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

Explore if planting seeds in a certain direction will affect how fast it germinates.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

The project determines which laundry detergent is best for cleaning clothes.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This science fair project idea determines if the temperature of rubber effects how high it bounces.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

This science fair project idea determines the most effective method of preserving food.

This science fair project idea measures and compares effects of chemical weathering, specifically carbonation, on different kinds of rocks.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Find out which kind of bubble wrap fares best when put in impact.

In this project, a magnet is used to collect iron from breakfast cereals.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This project examines whether people's taste perception is influenced by what they see.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.

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

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

The project investigates which soft drink is worse for your teeth by observing the affect of soft drink on limestone.