2nd - 4th Grade Science Projects Resources : Page 4

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

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

How powerful is the reaction between baking soda and vinegar? Find out here!

This science fair project idea investigates whether plants can survive being frozen.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Plants and light seem to be good buddies, but how far does the friendship really go?

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science fair project idea investigates the hardness property of minerals.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

This science fair project idea determines if the color of light affects the growth of plants.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

This science fair project idea produces varying pitches of sound.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

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.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

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.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.