This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

This science fair project idea identifies trees using a dichotomous key.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

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

This science fair project idea deals with the qualities of shade on a sunny day.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Some fossils have been been preserved for billions of years! Help your kid understand how fossils are created and preserved with this crafty project.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

Make a spring collage with your child to get them outside and those creative juices flowing!

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

This science fair project idea provides evidence that air is everywhere and takes up space.

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

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

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.