In this science fair project, students examine how the flow rate in a stream affects the growth of aquatic plants.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

In this science project, baking powder and vinegar are used to simulate the action of a fire extinguisher.

Research what is known about Alzheimer's disease and its treatment, and then prepare a script for television to educate the public.

This science fair project idea determines whether eating before or after exercise is more beneficial to health and performance.

Make a list of items that need repurposing such as e-waste, batteries and mattresses. Invent your own original repurposed design.

Quench your thirst with great tasting lemonade while you explore the concepts of acid and base, and how these differ from sweet and sour.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

This experiment investigates whether left-handed test subjects have better memories than right-handed participants.

In this project, students will learn what and how foods are grown in rain forests and if there are sustainable methods that can be used.

Research basic components of vacuum cleaners, consult vacuum cleaner manufacturers for advice. Design vacuum with attachments that change automatically.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Science fair project that examines search engine optimization, internet search trends using a statistical study of searched keywords.

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.

The objective of this science fair project it to determine whether adding ethanol alcohol to gasoline slows the run time of a motor.

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

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

This project explores whether similar type movie scenes are accompanied by music with similar characteristics.

This experiment uses personality assessments to evaluate the prevalence of specific character traits in left-handed and right-handed people

This science fair project idea explores what common compounds can be easily separated out in a centrifuge.

This science fair project idea studies past and current fads and trends.

Determine which environment keeps an ice cube frozen for the longest duration. Inspect and record your observations when cubes melt.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.