This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Develop a new system for predicting geographic changes. Demonstrate the nature of geographic change. Make logical predictions.

Check out this fun science project idea on ecological succession and learn the main difference between primary and secondary succession.

This science fair project teaches students about wilting and browning of salad greens.

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

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

This biodiversity project examines the biodiversity in your own backyard.

This science fair project determines if the allelopathic chemical produced by the black walnut tree biodegrades immediately or persists over several days.

This project investigates several commercially decaffeinated tea types (black, green, oolong, white) for the presence of detectable traces of caffeine.

Science fair project that compares leaf pigments of various tree species. Which tree species do you think will have the most pigments and why?

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

This science fair project examines whether ocean water can be made safe to drink.

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

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.

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

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

This project researches whether the type of land use affects the water quality of Queenstown Creek.

This experiment explores whether music affects the growth of bacteria and could help figure out better ways to process sewage and other microbe-assisted duties.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Help children understand the power of germs and the importance of hand washing with this visual activity that introduces the concept of scientific inquiry.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

This science fair project idea raises awareness of a real ecological issue.

This science fair project idea determines which flower lasts the longest.