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Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

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

Develop a new system for predicting geographic changes. Demonstrate the nature of geographic change. Make logical predictions.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

Check out this cool science fair project idea to explore various aspects of projectile motions like mass, angle and distance.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This science fair project teaches students the differences between fruits and vegetables.

Test of the effect of exercise on rote memory. Prepare a single list of 40 randomly chosen words. Have volunteers recall as many words as possible.

Science fair project that explains and demonstrates the parallax principle.

Learn about the growing app design field by designing a new or improved app for smartphones.

This experiment examines whether social orientation (extroversion or introversion) is correlated with memory.

In this science fair experiment, high school students fit the growth pattern of bacteria to a mathematical model and predict future colony expansion.

This science project teaches students to classify different shapes of leaves.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Evaluate gender differences in processing visual information.

Determine the effect of reading aloud on memory skills. Prepare a list of randomly chosen words, ask volunteers to recall as many as possible from the list.

Science fair project that designs a video game that requires players to use relevant skills.

This middle school science fair project evaluates test subjectsâ ability to determine what a person is feeling by reading their facial microexpressions.

What happens when "coffee-addicts" miss coffee for 1 day? Find out in this science fair project idea!

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

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

Science fair project that examines how light wavelengths affect photosynthesis in the aquatic plant: Elodea.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

This science fair project idea tests the efficiency of short term memory.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

Free science fair project idea examining how different types of water affect plant germination and growth.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.