High School Science Experiments (Page 9)

What Conflicting Mental Tasks Reveal About Thinking: The Stroop Effect

Science Fair Project Idea

Scientific Method

Can you pat your head with one hand while you rub your stomach with the other? This science project idea is kind of like doing that, but this project can actually give you some insight into how your mind works. The task is to name colors. It sounds simple enough, but see what happens when color words get in the way. Read more

15 Density Science Experiments

Blog Post

Use these free science lessons, experiments, and activities to teach K-12 students about density. Sometimes students wrongly think that an object's density is the same as its weight or its mass. Instead, density refers to an object's mass in a given volume. Two objects that have the same shape and size (volume) but have a different mass (like two same-sized balls with different weights) have different densities. As a physical property of… Read more

Build a Rubber Band-Powered Car

STEM Activity

1

2

3

4

5

604 reviews

Admit it, you've probably launched a rubber band at least once—pulled one end back, and let it go flying. Did you ever suspect that rubber bands could also be a fun way to learn about physics and engineering? Find out in this project where you'll build a rubber band-powered car. Read more

2026 Ball Run Challenge

Science Fair Project Idea

Engineering Design Process

In this engineering challenge, you will build a ball run from paper and tape, but there's a twist! You want to make your ball run as slow as possible. How long can you make it take for the ball to get from the entrance to the exit? Read more

25+ Coding Projects for Beginners and Beyond

Blog Post

Planning an hour of code with students for Computer Science Education Week? Try these projects and activities to help students explore computer coding now and after! It's easy for students to get started learning about computer programming and video game and app design. Basic coding involves writing an algorithmic set of steps that tell a computer exactly what to do. No matter what language or programming environment will be used, learning to write… Read more

Make a Lemon Volcano

STEM Activity

1

2

3

4

5

1176 reviews

Make a colorful erupting volcano in your kitchen with lemons and baking soda! Read more

Marble Roller Coaster: How Much Height to Loop the Loop?

Science Fair Project Idea

Scientific Method

This is a really fun project even if you don't like going on roller coasters yourself. You'll build a roller coaster track for marbles using foam pipe insulation and masking tape, and see how much of an initial drop is required to get the marble to "loop the loop." It's a great way to learn about how stored energy (potential energy) is converted into the energy of motion (kinetic energy). Read more

Rocking the Boat

Science Fair Project Idea

Scientific Method

When a ship rocks back and forth, it can make people seasick. Even worse, it can make it dangerous for jets to land on aircraft carriers. For these reasons and many others, it's important for engineers to design bilge keels (or fins) to keep boats from rolling back and forth. Become an engineer for a day and discover the best way to keep from rocking the boat in this engineering science fair project! Read more

13 Tasty Food Science Experiments!

Blog Post

These food science experiments lead to fun, unusual, and tasty creations! Try one of these STEM projects for engaging kitchen chemistry, and molecular gastronomy. There's a bit of physics and technology baked in, too! 13 Tasty Food Science Experiments! With food science projects and experiments, students measure, mix, cook, bake, and investigate the importance of specific ingredients, the science of mixtures and solutions, and the chemical reactions… Read more

How Salty Does the Sea Have to Be for an Egg to Float?

Science Fair Project Idea

Scientific Method

Some objects float on top of the ocean, and other objects sink to the bottom. Why? Try this eggsperiment to find out! Read more

High School Science Experiments (top 2,000 results)

Explore Our Science Videos