High School Science Experiments (Page 195)

Silt Deposits in Streams

Science Fair Project Idea

Scientific Method

Silt is a fine sediment that collects on the bottoms of rivers, streams and lakes. The natural process of the decay of organisms into the water can lead to the production of silt at the bottom of a lake. Silt can be a rich source of nutrients for fish and bottom dwellers like crayfish. However, it can also be introduced by unnatural processes. One problem for rivers, lakes and streams is the buildup of excess fine sediment introduced by industry. Because it often contains harmful chemicals it… Read more

Simple Machines and Potato Holes

Blog Post

In this family STEM activity, kids are challenged to find the easiest way to drill holes in a raw potato. There is a "simple machine" key to this challenge! Simple Machine Power A raw potato can be pretty firm, and trying to punch or drill holes into it can be more difficult than you might expect. Science, however, holds the key to making it easy! In this week's family-friendly science activity, students experiment with pencils and straws to find the… Read more

Simplified STEM Activities Help Fill Gap for Online, Remote, Hybrid Learning

Blog Post

Science Buddies has more than 200 free science and engineering activities teachers can use in preparing for classroom, remote, hybrid, or pod learning. This activity with balloons is one of 200+ activities available at Science Buddies that can be used for classroom, remote, hybrid, and pod learning - or in afterschool and out-of-school programs Science Buddies has more than 200 free science activities that offer fun, easy-to-follow, informal STEM… Read more

Simulate Microchip Clean Room Contamination with Crayon Leaf Rubbings

Science Fair Project Idea

Scientific Method

Have you ever made a leaf rubbing or imprint using paper and crayons? What do you think would happen if you got dirt or sand on the leaf? Would it mess up the result? In this project you will find out and learn about how this is related to the process of making the microchips that run our phones, computers, and other electronic devices. Check out this page for more science projects related to this process. Read more

Singing Science: How High and Low Can Your Voice Go?

STEM Activity

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Do you enjoy getting together with family and friends to sing familiar holiday songs? It can be fun to do this time of year, gathered around a piano with a warm fireplace nearby, or bundled up together outside. Have you ever wondered what the highest note is that you can sing? How about the lowest? Or what about other people – do you think males and females can reach the same notes? How about children and adults? In this “note”-worth science activity, you’ll get to… Read more

Singing Science: Weekly Science Activity

Blog Post

Photo: Children's choir. In this week's spotlight: a music-themed science activity that guides families in an exploration of vocal ranges. What determines how high or how low you can sing? What does the length of your vocal chords have to do with your vocal range? Does age or gender have anything to do with the highest note you can hit? Put these questions to a singing test with a science experiment. Comparing Vocal Ranges: How High and Low Can You Go? (full Science Buddies… Read more

Size vs. Depth: The Relationship Between the Size of a Seed and Its Ideal Planting Depth

Science Fair Project Idea

Scientific Method

Plants have evolved many clever mechanisms to ensure that their seeds will wait for appropriate conditions before sprouting. Some may only germinate after a fire, others only after going through a cold spell. This project explores one important variable among many that determine the ideal conditions for seed germination. Read more

Skateboard Extremes: Which Wheels are Best for Speed & Turns?

Science Fair Project Idea

Scientific Method

Skateboarder alert: Extreme performance needed in this project. You can cruise and carve while you investigate which skateboard wheels produce the fastest (and slowest) rides on your terrain in these experiments. You pick the wheels and design the tests you think will produce the most extreme results for speed and turns. Do this project and you can work on your ride and learn some science about the speed, spin, and design of skateboard wheels. Read more

Skating and Angular Momentum

Science Fair Project Idea

Scientific Method

Place a desk chair (one that rotates easily on ball bearings) in the center of the room, away from any obstructions. Put your hands on your lap and have a helper give you a push to start you rotating. You'll need to quantify the results somehow. For example, your helper could measure the number of revolutions you make in 5 seconds. Now try extending your arms after your helper starts you spinning. Next, start with your arms out, and bring them in close to your body after you start… Read more

Skeleton Building

Science Fair Project Idea

Scientific Method

Do you like skeletons? One of the more interesting jobs at a natural history museum is the creation and care of the skeletons and bones. How do the curators clean and put together the skeletons? Many curators use the carrion beetle, Dermestes vulpinus, to quickly clean off the dead animal tissue from a corpse to reveal the skeleton. These insects do such a good job that sometimes the skeleton remains intact! Another method is to slow cook the carcass until the meat falls off. You can use… Read more

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