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Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Science fair project that examines the relationship between fluid flow rate, pressure, and resistance.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

How does light affect plant growth? Do different colors of light work better than others? Find out in this classic science fair project idea.

This science fair project idea explores substances that cause a bubble to last longer.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

This science fair project idea identifies and understands adaptations in birds.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

Science fair project that evaluates how well clothing fabrics block UV radiation by examining the properties of different fabrics.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

This science fair project idea explores whether the types and brands of faucet filters are relevant to their performance.

Science fair project that measures the relative times it takes a plastic bag and a biodegradable plastic bag to decompose.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

Determine whether the relationship between a personâs armspan and height are genetic.

Examine the effect of pressure on carbonation in soda.

Test out various brands of permanent markers to see which one is least water soluble.

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

This science fair project idea provides evidence that air is everywhere and takes up space.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This science fair project idea explores which is better for diffusion and cell absorbing, more surface area, or more volume.

In this CD hovercraft science project, students will construct their own DIY hovercraft.