This science fair project idea explores how length affects the weight a bridge can hold.

In this investigation, an oil spill is simulated in a jar to observe the damage that oil spills have on the ocean and ocean life.

In this project, you will observe and record changes in sunspots over two weeks.

This experiment demonstrates the conservation and transfer of energy using a marble rolling over sandpaper.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

This science fair project determines if the allelopathic chemical produced by the black walnut tree biodegrades immediately or persists over several days.

Science fair project which determines whether your current calorie intake will cause you to lose or gain weight over time.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

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

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.

Observe trends in the properties of writing materials over past 5000 years and extrapolate to future time. Prepare a table that compares writing material.

This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

This fun science project explores the climate change over the course of the history of Earth and helps construct a diorama representing a geologic time period.

Measure temperature change over time using a variety of insulation materials. Be creative with insulation materials: scarves, yarn, socks, feathers, oil, etc

This science fair project idea determines an average personâs ability to use their anaerobic power system over a period of 2 weeks.

In this cool elementary school science fair project idea make a model to learn what happens to the Earth's surface when ice moves over land.

How do crystals form? In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Science fair project idea examines what is remembered from high school education. Formulate and administer high school curriculum tests to adults over 21.

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.

Learn about our response to scents that existed in our environment over evolutionary time and consider why scents might affect our mood state.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

Camouflage is one of the most important animal adaptations in the African savanna biome. Kids create their own camouflage with this fun science fair project.

Investigate how to keep your fruit fresh for longer. The purpose of this science experiment it to determine which kind of bag best preserves fruit.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

Check out this cool science project idea to explore how temperature creates annual rhythms that govern plant growth.