Fourth Grade Science Experiments (Page 9)

Make Magnetic Slime

STEM Activity

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What happens when you add iron filings to regular slime? You get magnetic slime! Make your own magnetic blob that will swallow up a magnet in this fun experiment. Read more

Simple Lie Detector Test

Science Fair Project Idea

Scientific Method

Have you ever watched a great sports player and imitated his or her moves over and over again? Or have you ever felt really bad when someone got hurt or things just weren't going his or her way? If so, you might be surprised to learn that you have been practicing skills closely tied to lying! In this science fair project, you'll discover how your brain gets a workout when it moves from truth-telling to lying, and how you can detect the shift. That's no lie! Read more

Build a Gauss Rifle!

Science Fair Project Idea

Scientific Method

What can you do with magnets and ball bearings that makes a lot of noise? Why, build a magnetic linear accelerator, called a Gauss rifle, of course! Now, this magnetic accelerator is not a weapon, but a way for you to learn a lot more about physics concepts, like momentum. In this physics science project, you will investigate how far a ball bearing launched by a Gauss rifle will fly, depending on how many magnetic acceleration stages are in the setup and the ball bearing's initial velocity.… Read more

Can Humans Recognize AI-Generated Images?

Science Fair Project Idea

Scientific Method

Can you tell if the pictures on this page are real or generated by a computer? Artificial intelligence (AI) generated images have exploded in popularity, bringing plenty of controversy along with them. An AI-generated image of a tiger or a flower might seem harmless, but artificial images of people or events can contribute to "fake news." In this science project you will investigate whether people can tell the difference between real pictures and pictures generated by AI. Can you spot the… Read more

Now You're Cooking! Building a Simple Solar Oven

Science Fair Project Idea

Scientific Method

Here is a project that uses direct solar power, gathering the sun's rays for heating/sterilizing water or cooking. It is a low-cost technology that seems to have everything going for it. Does it work? Can you find ways to improve it? Find out with this project. Read more

19 Science Activities for Mother's Day

Blog Post

Combine crafty ideas for Mother's Day with STEM for creative gifts moms will love. With a few simple materials, kids can do one of these science activities to make something thoughtful or unique to give mom or another special person. STEM Activities to Make or Do and Give! Whether made surreptitiously at home or made in the classroom and set aside to take home, Mother's Day is often marked with "I made this" gifts for kids to proudly present to Mom or… Read more

Bottle Rocket Blast Off!

Science Fair Project Idea

Scientific Method

3... 2... 1... 0— blastoff! In this science project, you will use a bottle rocket launcher to launch your own bottle rocket. You will load it with water and pressurized air, make several launches, and find out what makes your rocket soar the highest. Read more

Build a Circuit to Automatically Water Your Plants

Science Fair Project Idea

Engineering Design Process

Have you ever taken care of a plant? It can be tricky to get it right. You have to remember to water it regularly, and you also have to make sure to give it the right amount of water — not too much or too little. What if technology could help? In this engineering project, you will learn how to automate the entire process of watering a plant. Using a soil moisture sensor and a pump, you will build a circuit that will automatically detect when the soil is too dry, add water, and stop when… Read more

Build Your Own Crystal Radio

Science Fair Project Idea

Scientific Method

Have you ever wondered how a radio can grab signals that are transmitted through the air and convert them into sound? In this science project, you will build your own AM radio receiver from scratch and use it to listen to AM radio broadcasts. With your crystal radio you will be able to experiment with the circuit and the antenna to get the best reception. Read more

Crime Scene Chemistry—The Cool Blue Light of Luminol

Science Fair Project Idea

Scientific Method

You may have seen police investigators on TV spraying a crime scene with a liquid that glows blue if there is any blood present. Luminol is the chemical which causes the glowing. In this chemistry science fair project, you will investigate what factors make this interesting molecule "light up." Read more

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