The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Explore this fun middle school science fair idea to learn about photosynthesis and the key role of light in the growth of green plants.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science fair project idea examines reptile behavior and to determine whether reptiles are more active during warmer temperatures.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Science fair project that helps visualize how the human brain functions by constructing a model of a brain.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

Explore the neural and mental mechanisms at play in mental imagery.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

Science fair project that studies how the brain transforms man-made symbols into meaningful concepts.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

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

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

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

Look for correlation between pH values of commercial soaps and detergents and manufacturer claims about eye irritation hazards.

Determine which environment keeps an ice cube frozen for the longest duration. Inspect and record your observations when cubes melt.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

Determine the efficiency of multi-tasking by comparing how long it takes students to complete different tasks. Collate data, complete Summary Chart.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

Get a cool middle school chemistry project idea on how to determine whether a physical or a chemical change has taken place.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

Get a cool science fair project idea for middle schoolers on the effect of adding sugar to the growth of green plants.