Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

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

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

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

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Determine whether the application of Febreeze will lower the bacterial count.

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.

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

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

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

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

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.

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

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.

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

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science fair project idea investigates the hardness property of minerals.

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

This science fair project examines the vein structure (venation) of leaves in order to determine the class of the plant sample.

This experiment evaluates if personality influences whether a person prefers dogs or cats.

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

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

Science fair project idea that compares number and relative sizes of leaf stomata. Collect leaves of plant species, identify, observe stomata with microscope.

Fibonacci sequences have been observed throughout nature, like in leaves and flowers. In this project, students find examples of the Fibonacci sequence.

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

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

Start your toy engines -- this is going to be a fast and friction-filled race!

This science fair project idea explores the fastest average speed a human can talk.

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