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High School Science Experiments (top 2,000 results)

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Water Quality
Science Fair Project Idea
Scientific Method
It is important to ensure that we all have good clean water to drink that is not contaminated by heavy metals or chemicals. One common pollutant in a water supply is lead in old pipes or paints that can leach into the water and cause lead poisoning. There are different kits available for testing the presence of lead and other contaminants in water. Test your water supply, and also the water in some local ponds, lakes or streams. The same contaminants that can harm you can also harm wildlife. … Read more
Weathering
STEM Activity
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35 reviews
Weathering, or the wearing away of rock by exposure to the elements, not only creates perfectly smooth boulders, sinkholes to swim in, and caves to explore; it also eats away statues and buildings. Try it out on a sugar cube and feel how destructive weathering can be. Read more
Which Fruits Can Ruin Your Gelatin Dessert?
Science Fair Project Idea
Scientific Method
Why are some fruits, like pineapple, not recommended for adding to gelatin? It is because the gelatin may not solidify well if it has these fruits in it. In this science project you will determine whether certain enzymes in some fruits are preventing gelatin from solidifying, and whether there is a way to still include these fruits without ruining your gelatin dessert. It is an experiment with edible results! 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
X-Ray Vision: Seeing Into Space
Science Fair Project Idea
Scientific Method
Have you ever seen amazing, colored images of objects in space, like stars or even entire galaxies? Some of these images were originally taken with forms of radiation that the human eye cannot actually see, like x-rays. In order to create the beautiful pictures you see in the news or online, scientists have to use an image-editing program to add color to them. In this astronomy science project, you will use raw x-ray data from NASA's Chandra X-ray Observatory telescope to create amazing… Read more
24 Halloween Science Experiments!
Blog Post
From icky slime to candy coatings, fake blood, wearable LEDs, a fire snake, and things that foam, light up, or glow in the dark, we have STEM suggestions for spooky, Halloween-themed science and engineering to explore with students! Halloween Science and Engineering Projects! Trick or treat! It's Halloween season! With its emphasis on the ghostly, the ghoulish, the gruesome, the spooky, the icky, and, of course, the sweet (to eat), Halloween brings an assortment of exciting themes to… Read more
26 Science Projects for Spring
Blog Post
Celebrate spring with these free science and engineering lessons, projects, and activities for enriching hands-on STEM related to spring weather, flowers, plants, and more! STEM Activities to Explore Spring Themes to Science Class After the winter months, the return of spring brings fresh patterns of weather, animal behavior, plant growth, and more. There are plenty of opportunities for students to explore science with activities related to… Read more
3D Print with Icing: No 3D Printer Required!
STEM Activity
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Are you wondering how a 3D printer works? In this fun activity, you will be the printer and make colorful 3D prints using royal icing. No 3D printer is required, and your prints are edible! Read more
7 Wearable Circuits Science Projects
Blog Post
Explore cutting-edge electronics and engineering with wearable electronics science projects. From e-textiles and sewn circuits to personalize clothing and accessories to DIY wearables for health and safety, students can design, build, and test their own. Experiment with Wearable Electronics Wearable electronics, also called "wearables," are circuits and electronic devices that are designed to be worn. Devices like smart watches and fitness trackers are a familiar form of wearable, but many… Read more
A Model of Gravity in Our Solar System
Science Fair Project Idea
Scientific Method
Why do the planets orbit the sun without flying off into space? Do they move in perfect circles or do their orbits take a different shape? And how could you possibly do a science project about any of this—you can't do an experiment with the planets! However, you can build a model of our solar system that demonstrates the concept of gravity, using balls of different sizes to represent the sun and planets. Watch the summary video for an excellent introduction to the model. Think about how… Read more
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