Third Grade Science Experiments (Page 80)

Fantastic Fossilization! Discover the Conditions For Creating the Best Cast Fossils

Science Fair Project Idea

Scientific Method

Have you ever stood close to a fossilized T. rex skull and counted its razor-sharp teeth? Or, have you seen a fossilized stegosaurus skeleton and thought about how it defended itself with tail spikes and armored plates? A trip to a natural history museum lets you imagine what dinosaurs looked like and wonder what life with them on Earth was like. Fossils give us information about animals and plants that lived long ago. Certain places around the world contain more fossils than others. Why? Would… Read more

Follow the Flow

Science Fair Project Idea

Engineering Design Process

This project is inspired by the Banaue Rice Terraces, 2,000 year old structures carved into mountainsides in the Philippines. See if you can recreate the water flow of this ancient marvel, often called the Eighth Wonder of the World, using just household materials! Looking for inspiration? You can see how other students have tackled this and other annual Science Buddies Engineering Challenges. Read more

Fun Science Picks for Winter Break

Blog Post

The winter break from school leaves many kids with time on their hands. Hands-on science, technology, engineering, and math activities can inspire and excite your kids. With with fun STEM activities like these on hand, everyone can enjoy family science. Make it a winter break tradition! Squishy Circuits: Light Up Your Play Doh® Creations! Build a Gumdrop Geodesic Dome Paper Circuits: Make Electrifying Art The Amazing Floating Train Make an… Read more

Generate Recipes from YouTube Videos with AI

Science Fair Project Idea

Engineering Design Process

This project explores how large language models (LLMs) can generate recipes from YouTube cooking videos. In this science project, you will learn how LLMs interpret language and how prompt design can affect results. Read more

Genetically Engineer Yeast to be Fluorescent

Science Fair Project Idea

Scientific Method

Can you imagine a glowing loaf of bread? You might not be able to make the whole loaf glow, but you can get baker's yeast to fluoresce! The way to do this is to modify the genetic information of the yeast organism. The technology that is used to do this is called genetic engineering. With genetic engineering, you can insert a fluorescent protein gene from a jellyfish into yeast cells, so they start glowing under blue light! Do this project to see for yourself! Read more

Give It a Lift with a Lever

Science Fair Project Idea

Scientific Method

Did you know that you can lift an object that's heavier than you are? Just use a lever! In this science project you'll build a tabletop lever and measure how much effort it takes to lift an object using it. Read more

Give Yourself a Lift: Lightening the Load with Pulleys

Science Fair Project Idea

Scientific Method

Before the Industrial Age, people relied on muscle power for moving and lifting heavy objects. Here's a project that shows you how you can use your head to make heavy lifting easier on your muscles–and your back! Read more

Heart Rate Recovery Times

Science Fair Project Idea

Scientific Method

Over an average lifetime, the human heart beats more than 2.5 billion times, supplying blood to the entire body. When a person exercises, the heart has to work harder than usual. Have you ever wondered how quickly your heart beats when you exercise, or how long it takes to recover back to its normal rate after you are done exercising? Is the heart rate recovery time faster for people who get regular exercise compared to people who do not? Try out this science project to find out! Read more

Heavy Metals and Aquatic Environments

Science Fair Project Idea

Scientific Method

You might know that lead can be toxic, and that you can get lead poisoning from eating or inhaling old paint dust. Lead is called a heavy metal, and there are other sources of heavy metals that can be toxic, too. Silver, copper, mercury, nickel, cadmium, arsenic, and chromium are all heavy metals that can be toxic in certain environments. In this experiment, find out if one common heavy metal, copper, can be toxic to an aquatic environment. Read more

Holes That Do Not Leak!

STEM Activity

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Did you know that at sea level there are about 15 pounds of air pressing on each square inch of your body? This air is very helpful in our daily lives. For example, this layer of air helps to keep the Earth from getting inhospitably cold or hot. It can even help keep a bottle with holes in it leak-free! Try the activity to find out how. Read more

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