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

This science project involves comparing the relative effectiveness of salt, pepper and dehydration in food preservation.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Science fair project that compares tree leaf size and shape based on the leaf's position in the tree. Is their is a noticeable difference between high and low?

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

How do cold packs work? Explore endothermic reactions by comparing the temperature change that results from various chemicals added to water to find out!

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

Science fair project idea that measures fuel efficiency in cars. Calculate cost per mile by comparing fuel cost and consumption data.

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

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science fair project explores discover whether the acidity of sour candy is comparable to that of battery acid.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

Science fair project which identifies the most effective insulator that you could use to make a winter coat by comparing how well cloth and cotton trap heat.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!