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Use a dichotomous key to identify plants or animals.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

In this science fair experiment about recycling, demonstrate how the wax from a candle can be reused to make another candle.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

Design a hearing protection device to protect their ears from loud noises. Examine the properties of current protective hearing devices, materials.

This science fair project examines discover whether different formations of deodorant works better for certain skin types.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Polymers remove oil from contaminated waters. The purpose of this science project is to test the effectiveness of a polymer in cleaning up an oil spill.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

Store bowls of fresh fruit in differently lighted environments. Contrast freshness based on appearance.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

Science fair project that compares tap water and bottled water for the presence of common impurities.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

Check out this fun science fair project idea to determine if the size of a particle affect the rate or speed of a chemical reaction.

Evaluate the ability of a biodegradable dish detergent to increase the penetration of water in hydrophobic soils.

This science fair project idea explores which kinds of earplugs are the most effective.

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

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

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

Get a fun high school physics science fair project idea one of the states of matter called plasma and the applications of this unique coil.

Analytical chemists perform chromatography to separate colors into pigments. Test the food coloring used in M&M's and Skittles candy in this fun project!

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

Determine the growth rates of different types of human hair. Ask volunteers to not cut their hair until the end of experiment. Measure hair length.

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

Study the anatomy of the brain and the functions of the corpus callosum. Research split brain surgery and its impact on advances in neuroscience.