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Fourth Grade Science Experiments (top 2,000 results)

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Try the Mythbusters' "Phone Book Friction" Experiment at Home
Science Fair Project Idea
Scientific Method
Have you ever heard that two phone books with the pages interleaved are impossible to pull apart? This might seem crazy, right? It is not that hard to slide a sheet of paper off the top of a stack of paper. How much friction can there really be between sheets of paper? In this experiment, you will use pads of sticky notes instead of phone books. How much weight can they support when you interleave the pages? Do you think you will be able to pull them apart by hand? The results might surprise… Read more
Underwater Color Bursts
STEM Activity
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129 reviews
Summertime often brings beautiful fireworks displays. Whereas you normally look up into the sky to see fireworks, in this activity we will take the bursts of color underwater—with chemistry. Although it is not exactly the same as real fireworks, you will be amazed by the color explosions you will see. Curious about what that looks like? See for yourself in this activity! Read more
Which Materials are the Best Conductors?
Science Fair Project Idea
Scientific Method
Electricity powers many of the devices we use every day, from lights to video games and computers. Engineers have to use certain materials to make electrical devices work. In this experiment, you will find out which materials let electricity flow through them (conductors) and which ones prevent electricity from flowing through them (insulators). Read more
Why Aren't All Medicines Pills?
Science Fair Project Idea
Scientific Method
No one likes shots, so why don't we swallow all our medications? In this science project, you will use a model to explore one challenge behind making medications we can quickly swallow, using insulin (a medication taken by some diabetes patients) as an example. Will your medication be functional after spending time in an environment similar to the stomach? Read more
11+ Engineering Challenges for High School
Blog Post
Challenge high school students to think like engineers and design, build, and test their own solutions to one of these free engineering projects. 11+ Engineering Projects for High School Students! Engineering design projects and challenges are a great way to ignite student interest in STEM. When students tackle an engineering design challenge, they are encouraged to brainstorm, design, build, test, problem solve, troubleshoot, tinker, innovate, and… Read more
12+ Engineering Challenges for Elementary School
Blog Post
Teach students to think like engineers with fun hands-on building and design challenges. Spark interest and build confidence with one of these free engineering projects for elementary school students. 12+ Engineering Projects to Inspire Elementary School Students! Engineering design projects and challenges are a great way to ignite student interest in STEM. When students tackle an engineering design challenge, they are encouraged to brainstorm,… Read more
15 Science Projects to Make and Give for Father's Day
Blog Post
Father's Day is coming up! Creative STEM activities are a fun way for kids to make something with that perfect DIY flair to mark the day. STEM Activities to Make or Do and Give! Giving something to celebrate Father's Day (or Mother's Day) should be simple! It doesn't have to cost a lot to make something one-of-a-kind and special to give to Dad, a father figure, or another special person. Many of the ideas highlighted below use materials you can… Read more
19 Fall Science Projects
Blog Post
Pair changing leaves and temperatures, apple season, pumpkins, Thanksgiving, and fall festivities with these free lessons and activities for enriching hands-on STEM. STEM Activities to Bring Autumn Themes to Science Class 1. Invisible Ink with Turmeric The same turmeric you might have out for Autumn cooking or as a seasoning at Thanksgiving, can be used as a revealing agent in the Secret Messages With Invisible Ink! chemistry activity. Write… Read more
A Juicy Project: Extracting Apple Juice with Pectinase
Science Fair Project Idea
Scientific Method
Do you know why enzymes are oftentimes called the workhorses of biochemistry? It's because they can speed up a wide variety of chemical reactions, and chemists and biologists use enzymes to do all kinds of jobs. In this project, pectinase, an enzyme frequently used in the food industry, will be used to extract juice from apples. Read more
AI Hyperrealism: Do AI Faces Look More Real Than Human Faces?
Science Fair Project Idea
Scientific Method
Artificial intelligence (AI) programs can now generate photorealistic pictures of people who do not exist in the real world. How can you tell if a picture is of a real person or a fake, AI-generated person? What features of the picture do people use to decide whether the face is real or AI-generated? In this project, you will explore these questions as you ask volunteers to look at both real and AI-generated pictures of human faces. Read more
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