3rd and 4th Grade Engineering and Science Inquiry Resources : Page 4

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

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

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

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

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

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.

In this design challenge, your child will make a bottle rocket using typical household items.

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.

In this fun activity, your child will create their very own solar oven to bake s'mores!

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.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

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

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

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.

In this design thinking activity, your child will choose an animal to research, learn about the animal’s habitat, and then replicate the animal's habitat using household items.

In this design challenge, your child will create a parachute for a small toy using typical household items.