Third Grade Science Experiments (Page 159)

Don't Stand So Close To Me! An Investigation into Personal Space

Science Fair Project Idea

Scientific Method

How do you feel when a friend comes too close to you? How far away or close do you think is necessary to have a conversation with someone? The answers to these questions are dependent upon the size of your personal space. Some people like to be within a foot of each other when having a conversation and others feel that being 3 feet apart is still just a little too close for comfort. Personal space is defined as the protective area surrounding a person's body (not necessarily spherical in… Read more

Drag Racing in the Water

Science Fair Project Idea

Scientific Method

It's fun to go swimming! To feel the power of your body as you launch yourself into the water. But did you know that swimming isn't just about skill and athleticism? The human body consists of skin, contours, and curves. How the water moves along your body and the clothing you are wearing determines how fast you can go. In this science fair project, you will investigate the effects of a force called drag. You will compare the time it takes to swim 25 meters in a swimsuit versus swimming the… Read more

Draw a Spirograph with a Raspberry Pi

Science Fair Project Idea

Scientific Method

Have you ever used a toy like a Spirograph® to draw precise, repeatable patterns on a piece of paper? What if you could use a computer to automatically draw the patterns for you? This project will show you how to do just that using a Raspberry Pi. Check out the video to see what this simple, but fun, project looks like. IMPORTANT: The instructions for this project were originally written using Scratch 2 on a Raspberry Pi 3B+. If you are using a newer Raspberry Pi running Scratch 3, you… Read more

Drawing Circles Around Ants

STEM Activity

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Have you ever had ants ruin your picnic? Commercial ant repellents can keep them away, but who wants to spray poison near their food? In this activity, you can investigate the effectiveness of some less toxic solutions that you may have around your home. Armed with your discoveries, you may be able to keep your next picnic from turning into an ant buffet! Read more

Dried Foods: The Science Behind Making Lightweight Snacks

Science Fair Project Idea

Scientific Method

If you've ever been on a long hike, you probably already know how hungry all that walking can make you. But if you're going a long distance, the last thing you want is a heavy pack of snacks on your back. So what can you bring along for a healthy, hunger-satisfying, lightweight snack? How about dried foods, like banana chips or beef jerky? Many foods have high water content. The drying process removes much of the water from the food, leaving behind a lighter, but equally nutritious snack. Just… Read more

Dry Spells, Wet Spells: How Common Are They?

Science Fair Project Idea

Scientific Method

Can you remember what the weather was like last week? Last year? Here's a project that looks at what the weather was like for over a hundred years. You'll use historical climate data to look at moisture conditions in regions across the continental U.S. You'll use a spreadsheet program to calculate the frequency of different moisture conditions for each region and make graphs for comparison. Which part of the country has the most frequent droughts? The most frequent periods of prolonged… Read more

Dust Busters: How No-Plow Farmers Try to Save Our Soil

Science Fair Project Idea

Scientific Method

Do you have any great-grandparents who lived through the Great Depression in the United States during the 1930's? If so, they might have stories to tell about terrible dust storms that blackened the skies, from the Midwest to the east coast. Severe drought was a factor in causing this "Dust Bowl" era, but decades of poor farming practices contributed to it, too. In this environmental science fair project, you'll learn about farming methods that help keep dirt from drying up into dust, and help… Read more

Dye Eggs Using Silk Ties for Egg-cellent Colors

Science Fair Project Idea

Scientific Method

Have you ever dyed eggs? Turning eggshells from white into different, dazzling colors can be a lot of fun! To do this, most people buy dye tablets to make different colors in a liquid bath. They then dip the egg into the liquid and wait till it turns the desired color. You can dye eggs in many other ways, and one neat method uses silk ties. Sounds strange to use clothing to dye eggs, right? But it actually works really well! In this science project, you will dye eggs with old or used… Read more

Earth Day Any Day: Doing Fun Science at Home during School Closures (Activity #16)

Blog Post

Follow along with a Science Buddies parent who is using family STEM activities to keep her kids learning at home during the COVID-19 school shutdown. New posts every Monday, Wednesday, and Friday. Today's adventure... exploring solar energy by building a solar updraft tower. Any Day (or Every Day) Can Be Earth Day Earth Day 2020 marks 50 years since the first Earth Day celebrations — I didn't think we'd be spending it like this! Typically,… Read more

Earth Surface Dynamics

Science Fair Project Idea

Scientific Method

Think about mountain ranges, canyons, sand dunes, or any other interesting geological feature you may live near enough to visit. The surface of the Earth is always changing due to a balance of forces both above and below the surface. Below-surface forces cause the Earth's crust to be faulted, folded, tilted, and lifted. Above-surface forces are primarily due to the natural processes of weathering and erosion. Can you show the effects of these forces using scale models, demonstrations,… Read more

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