This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

Get ready for a yummy taste test! Just pour the milk -- and make sure you have some chocolate chip cookies on hand.

Science fair project idea helps conceptualize probability. Compare probabilities and outcomes of cards drawn from a standard playing deck.

In this "paper and pen" science fair experiment, students will research the difference between standard time and astronomical mean time.

This science fair project evaluates if and how eating a large meal affects ability to perform mental tasks.

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

Science fair project that demonstrates how stalagmites and stalactites are formed.

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

Determine which material produces the strongest static charge.

Free science fair project idea that examines air pollution in local environments. Particles are trapped by petroleum jelly on microscope slides.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

Science fair project that determines which types of clouds are best at blocking harmful UV radiation.

The objective of this science fair project is to determine whether drawing with the right side or the left side of your brain will produce a better picture.

The goal of this science fair project is to determine which cheese grows mold the fastest: Vermont Cheddar, American, Brie, or Camembert?

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.

The objective of this science project is to investigate patterns in fingerprints among family members.

This science fair project idea determines what factors influence an individual's reaction time using a web-based timed reaction test.

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

Science fair project that determines whether wireless networks damage living plants. Are WiFi radiation hazardous to your health?

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

In this project, you'll create Oersted's experiment, which relates to how electric currents create magnetic fields.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

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

This science fair project idea explores whether color affects a person's emotional state.

Science fair project that demonstrate how abrasions are formed on rocks in nature and the variations between types of rocks.