Fourth Grade Science Experiments (Page 80)

Colored Shadows

STEM Activity

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Have you ever wondered what the world would look like without colors? Most of us take them for granted since they are everywhere: blue sky, green grass, the yellow sun, and countless more. Your eyes are actually able to distinguish up to 10 million colors! But where do all the colors come from, and how do our eyes perceive them all? Find out with a little help from some shadows, and create numerous colors by mixing red, green and blue light. Read more

Correlation Between Relative Pitch and Age, Gender, or Musical Background

Science Fair Project Idea

Scientific Method

Here's an interesting way to get some music into your science fair project. What predictions would you make about people with relative pitch? Read more

CRISPR Gene Editing of Escherichia coli

Science Fair Project Idea

Scientific Method

Many scientists are currently very excited about CRISPR, as it has the potential to revolutionize gene editing. But what exactly is CRISPR and what does it do? CRISPR is a novel tool in gene editing that allows the modification of genetic DNA at specific target sites in many different organisms. Researchers have high hopes that this technology can, one day, cure genetic diseases, as mutated DNA sequences can easily be corrected. In this project, you will use CRISPR to mutate a DNA sequence… Read more

Determining Iodide Content of Salt

Science Fair Project Idea

Scientific Method

Have you ever noticed that the salt you are using says it is "iodized"? Iodine is an important micronutrient, which means we need it in small quantities to be healthy. Because iodine is rare in many people's normal diets, it is added to table salt. Then when people salt their food, they are also adding this important micronutrient. In this food science project, you will use some kitchen-friendly chemistry to investigate which types of salt have iodine added (in the form of iodide) and which do… Read more

Devising an Algorithm for Solving Rubik's Cube

Science Fair Project Idea

Scientific Method

If you're the kind of person who has taken apart your Rubik's cube in order to grease the inside parts so it will move more smoothly, this could be a great project for you. We'll show you three sets of move sequences that accomplish specific rearrangements of the cube. Can you devise a way to solve the cube using only these three move sequences? Read more

Distance and Speed of Rolling Objects Measured from Video Recordings

Science Fair Project Idea

Scientific Method

This project is an experiment in classical physics. You'll be following in Galileo's footsteps, and investigating Newton's laws of motion, but you'll be taking advantage of modern video recording technology to make your measurements. Sure, it's been done before, but if you do it yourself, you can get a firm understanding of these important concepts. Read more

DIY Mini Drone: Arduino™ Altitude Control

STEM Activity

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How do drones automatically hover at a constant distance from the ground? Find out in this fun drone project as you build an altitude control circuit for a popsicle stick drone using an ultrasonic distance sensor and an Arduino™. See this page for a complete list of our mini drone projects. You may wish to do the projects in order. Read more

DIY Popsicle Stick Drone STEM

Blog Post

Series of STEM activities guides students in building and experimenting with a popsicle stick drone. From a beginner build to adding advanced Arduino controls, follow along to build and test your own mini drone! Drones can be fun (and challenging!) to fly. A drone's hovering flight may look effortless, but whether you've experimented with a drone indoors or outside, you know that a lot goes into expertly navigating a drone to keep it in the air and… Read more

Does Chemical Lightening Affect the Structure of Human Hair?

Science Fair Project Idea

Scientific Method

Does your hair go crazy when the weather turns damp? Did you know that strands of hair can relax and lengthen when the humidity increases and then contract again when the humidity decreases? In fact, hair strands can be used as the basis for a hygrometer, a device which measures the humidity level in the air. Can a human hair hygrometer also detect changes in hair structure caused by chemical lightening? This project shows you how to find out. Read more

Does Weight Affect a Drone's Battery Life?

Science Fair Project Idea

Scientific Method

Drones—also called quadcopters or unmanned aerial vehicles (UAVs)—are an increasingly popular toy for hobbyists. Some companies even want to use them for business purposes, like delivering packages right to your doorstep! However, drones typically have a rather short battery life. Does the added weight of a package affect a drone's battery life? Try this project to find out! Read more

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