High School Science Experiments (Page 76)

Recycling Greywater: Can Plants Tolerate It?

Science Fair Project Idea

Scientific Method

One way to conserve water is to find safe ways to use it more than once. Here is a project to test whether greywater (water that has been used for washing or bathing) can be used for watering ornamental plants. Read more

Rev Up STEM Learning with Car Science Projects

Blog Post

Use these free STEM lessons, experiments, and activities to teach science and engineering related to cars and to explore core science concepts with homemade cars. Rev Up STEM Learning — Car Science Experiments for Science Class and Science Fair Educators can use DIY cars made from simple materials to teach students about science and engineering related to the design, building, testing, and safety of cars and to demonstrate and explore general… Read more

Robot, Make Me a Sandwich!

STEM Activity

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74 reviews

Have you ever wanted a robot assistant that could do all your household chores? Science fiction has been showing us such robots for decades, but they're still not available! What's taking so long? In this project you will investigate some of the challenges in programming a "robot" to do a simple household task, such as making a sandwich. Read more

Rubbing Up Against Static Electricity

Science Fair Project Idea

Scientific Method

A tried and true balloon activity is to rub a balloon on your head to make your hair stand up. How does the rubbing build up static electricity? Do this experiment to see if the number of rubs makes a difference. Read more

Sandy Beaches and Reef Disturbance

Science Fair Project Idea

Scientific Method

When you go to the beach, you may not know if the beach is natural or man-made. The popularity of sandy beaches prompted developers in the past to bring in sand to cover rocky shorelines and turn them into more popular sandy beaches. However, the actions of the tides, currents and waves carried the extra sand out into the reef, endangering the reef and the creatures living on it. You can use a water table to conduct experiments with sand movements and reefs. How is sand moved by water? How… Read more

Satellite Collision Detection: A Hands-On Coding Experience

Science Fair Project Idea

Engineering Design Process

Have you ever wondered what would happen if two satellites crashed into each other in space? While space may seem empty, Earth’s orbit is actually crowded with satellites and debris. In this project, you’ll step into the role of a space engineer, using real satellite data to model orbits, track their movement, and predict potential collisions. You’ll explore how gravity and speed affect a satellite’s movement and learn how scientists use simple math and code to prevent… Read more

See Air Currents with Shadowgraphs and Schlieren Images

Science Fair Project Idea

Engineering Design Process

Have you ever wondered what the air currents look like around a candle? What about cold air flowing around an ice cube, or warm air rising from your hand? What about when you sneeze? We are surrounded by air currents all the time, but these subtle movements are completely invisible to the human eye. In this science project, you will take advantage of small changes in air density to make air currents visible in regular photographs and videos, using techniques called shadowgraphy and schlieren… Read more

Seebeck Effect: Turn Heat into Electricity, Then Measure It with a Thermocouple Thermometer

Science Fair Project Idea

Scientific Method

Everyone knows electricity can create heat, especially because our electrical appliances tend to warm up when turned on. But wouldn't it be cool to do the reverse — generate electricity from heat? In this science project, you will study why it happens, measure the effect, and then use the phenomenon to build your own device, a thermocouple thermometer, that will enable you to convert heat into electrical energy. Read more

Shaking for Butter

Science Fair Project Idea

Scientific Method

Hot pancakes with butter running down the sides, freshly baked biscuits and pastries with butter, hot flaky potatoes with melted butter. Yum! It seems like everything tastes better when you add butter. But what is butter and how is it made? In this food science fair project, you will find out, and you will test different conditions for making butter and determine the best method. Read more

Shine Bright Like a….Penny!

STEM Activity

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‘See a penny pick it up, all day long you’ll have good luck!’ – maybe you’ve heard this phrase before, and maybe you’ve even stopped to pick up a lucky penny off the sidewalk. But sometimes those pennies you see on the ground look anything but lucky. They look brown or black, and sometimes they’re so dirty looking that you can’t even tell whether they’re pennies! In this activity we’re going to explore why pennies don’t… Read more

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