This science project is to discover which Black Walnut tree tissue contains the most concentrated amount of Juglone, a substance that works like an herbicide.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

This science project examines the thermal properties of several major greenhouse gases.

In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

This science fair project idea demonstrates that plants give off water.

Find out whether putting something on top of a plant will inhibit its growth.

Culverts transport seeds away from their original location to different places. This science project examines the effect of culverts on plant growth in streams.

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

Examine the impact of insecticides on plant growth.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Observe which kind of fresh long-stemmed flower will last the longest after being picked.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Explore if planting seeds in a certain direction will affect how fast it germinates.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

The purpose of this science fair project is to investigate whether cooking seeds before planting will speed up germination and growth.

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

This science fair project examines the vein structure (venation) of leaves in order to determine the class of the plant sample.

This science fair project studies which color(s) of flowers butterflies & bees are attracted to and if color plays a role in flower selection for pollination.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Demonstrate the capillary function in plants by adding food coloring to glasses of water. Slice stalks of celery and leafy tops. Compare color of leaves