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.

Discover whether cold or hot water from the faucet will boil faster on the stove.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

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

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

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!

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

How powerful is the reaction between baking soda and vinegar? Find out here!

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

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

This science fair project idea researches the effects of acid rain on plant growth.

This science fair project idea is develops new or improved paper making techniques and encourages recycling.

This science fair project investigates why the number of visible stars changes from place to place.

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

Discover which fabrics shrink the most in the wash and why.

Do you think heat can affect a plant's growth rate?

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

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.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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

The project is to investigate yeast fermentation and its results on hand of latex balloons.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.