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What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Determine if each hemisphere specializes in dealing with specific functions. Include illustrations of the brain, it hemispheres.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Learn about the anatomy of the autonomic nervous system and its relationship to the rest of the body.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

This experiment explores how listening in to a one-sided conversation affects concentration.

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

Create a colorful, informative display that illustrates the properties of blood cells. Prepare slides using samples of fresh raw beef or chicken bone marrow.

This experiment observes inattentional blindness and investigates whether certain age groups or genders are more likely to demonstrate this phenomenon.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

In this experiment, you will evaluate whether or not a diet that is supplemented with "brain-enhancing" foods can help improve memory.

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

Consult astronomers for opinions and advice. Devise a mathematical argument regarding the probability of other planets supporting extra-terrestrial life.

The purpose of this project is to determine if there are fluctuations in the rising and the setting of the sun and the position of the earth as it rotates.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.

Use a dichotomous key to identify plants or animals.

Check out this fun science project idea to explore different types of starches and learn how removing starch affects the quality and taste of food.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Determine how wind speed affects the stability of a kite and the ease of getting it into the air.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.