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High School, Chemistry Science Experiments (165 results)

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Springtime Science: Exploring the Pigments in Red Flowers
STEM Activity
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7 reviews
In the springtime it can be easy to spot flowers in a dazzling array of colors at flower gardens and in plant nurseries.  And with Mother’s Day just around the corner, stunning flower bouquets are even more readily available in stores.  Have you ever wondered what pigments make a flower appear a certain color to us?  For example, what pigments make a rose be a deep, rich shade of red?  Do different flowers use the same pigments?  In this activity you’ll get… Read more
Staining Science: Making the Boldest, Brightest Tie-Dye!
STEM Activity
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3 reviews
Have you ever wondered about the materials that your clothes are made out of?  The clothes you wear are made of fibers that come from many different sources.  Some fabrics are made from natural fibers, and some from manufactured or totally synthetic fibers.  In this activity, you’ll explore how well different fiber types are dyed using fiber-reactive dye.  Aren’t you just dye-ing to find out which fabric works best? Read more
The Business of Fizziness: Test Your Soda Fizz!
STEM Activity
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12 reviews
You’ve probably seen the reaction that happens when you add Mentos candy to a diet soda. The resulting eruption is powerful enough to be dangerous, and is the source of many online videos! While many people are familiar with this reaction, few of them understand why it takes place. The Mentos + Soda reaction is not actually a chemical one, but a physical one called ‘nucleation’. In this activity we will explore nucleation in soda at a smaller scale by adding some unusual… Read more
Turn Soot into Silver
STEM Activity
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You might have heard the saying “not everything is as it seems.” Something might look great from far away, but when you take a closer look, it might not turn out to be as beautiful as you thought! In this activity, you will create the opposite experience—you will turn a spoon blackened with soot into shiny silver. Even though it is only an illusion, you will not know it when you see it. Try it out for yourself!    Read more
What's the Point of Boiling?
Science Fair Project Idea
Scientific Method
You know that water can exist in three separate phases: solid (ice), liquid (water), and vapor (steam). To change from one phase to another, you simply add (or remove) heat. When water boils, what happens to molecules (for example sugar or salt) that are dissolved in the water? Do they boil off too, or do they stay behind? Read more
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