In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

This science fair project investigates why the number of visible stars changes from place to place.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science experiment tests if dog saliva can really help heal wounds.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

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

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

In this experiment we will be determining whether birds prefer certain colors of seed.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

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

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.

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

The goal of this project is to create an exciting topographical map out of dough.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.