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Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science experiment tests if dog saliva can really help heal wounds.

Formulate a hypothesis and use the scientific method to determine the guess what is hidden in a box. Test abilities of volunteers, without opening box.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Science fair project that examines the physical features of elephants and butterflies and draws conclusions about their similarities.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This science fair project idea explores the different properties & interactions of sugar molecules.

This project examines the concentration of dissolved oxygen in water, with and without oil.

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

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 research project teaches students about synesthesia, a neurological condition that causes sensory overlap.

The aim of this science fair project is to examine the differences between brands of bottled water and analyze consumer preferences through a taste test.

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

Determine if it is easier to memorize colors, words, words in phrases, pictures or numbers. Determine at when retention rate in each category is the best.

This science fair project idea tests the efficacy of both synthetic and natural antibiotics.

Construct batteries that make electricity from fruits with this fun science fair project.

Science fair project that determines what neurons are, what they do and compiles this vital information in an illustrated book.

In this science fair project, students evaluate if astrological signs provide clues about people's personalities.

Design and build an invention inspired by Rube Goldberg's designs. Build your invention. Test the machine, write a detailed report.

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

Consult mechanics, automotive specialists for advice. Build a real engine or a scale model. Test and demonstrate its mechanical properties.

This cool middle school science fair project idea helps students explore the role phototropism plays in the growth of green plants.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.