Physics is the study of matter — what is it made of? How does it behave? What laws or equations describe it? From subatomic particles, to the Big Bang, modern physicists study matter at a tremendous range of scales. There's a whole lot of interesting physics at the human scale, too.
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| Featured Take the Science Buddies Engineering Challenge! Try the annual Engineering Challenge from Science Buddies! Open to all students worldwide, a new challenge and prizes are announced every January. Explore the current challenge as well as ones from past years! Read more
Build a Balloon Car Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 613 reviews Build a balloon-powered car from recycled materials in this fun activity. You can even grab a friend, build two cars, and race them against each other! Read more
Build a Popsicle Stick Catapult Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 191 reviews Catapults were mighty handy for pirates in the golden age of piracy (during the 17th century). And medieval knights used them centuries earlier for taking down massive castle walls. Even Greeks and Romans used catapults about 2,000 years ago! These simple machines are quite handy, as long as you know how to aim them! In this science activity you will try your hand at catapult technology. Can you predict where your cotton ball will land? Read more
Make a Cotton Ball Launcher Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 216 reviews Have you ever stretched and launched a rubber band at someone? Put that energy to good use and build a rubber band-powered cotton ball launcher in this fun activity! Read more
Featured Make String from Algae Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 47 reviews Did you know that the seaweed you've seen in the ocean or even eaten as a snack is inspiring innovators to imagine new materials? Large brown algae, like kelp, contains polymers—long chains of molecules—that are more environmentally friendly than the ones in most plastics. These natural polymers (alginates) could eventually be used to create sustainable everyday objects. Try your hand at using a bit of chemistry to turn biodegradable polymers from algae into your own custom… Read more
Build A Wall Marble Run Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 53 reviews In this activity, you will use recyclable materials to make your own wall marble run. A marble run is a fun toy and a great way to learn about physics concepts like kinetic and potential energy. Do you think your marble will make it to the end of the track? Read more
Build a Telescope Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 46 reviews Build your own telescope that you can use to see far-off objects in this fun STEM activity! The type of telescope you will build in this activity is also called a monocular or a spyglass. Read more
Walking Water Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 46 reviews Imagine this challenge: You have two glasses of water—one empty and one full. You want to pour half of the full glass into the empty one. The twist? You aren't allowed to pick up either glass! Can you get the water to "walk" between the glasses using nothing but a paper towel? Try this activity to find out! Read more
Making Shadow Puppets Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 39 reviews Have you ever played with your own shadow? It is fascinating how it follows your every move. But why do you not see your shadow every day? Why is your shadow very long sometimes, and other times very short? In this activity, you will make your own shadow puppet and explore how you can change the shape or size of its shadow. If you like, you can even create your own shadow play! Read more
Make a Rubber Band Guitar Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 65 reviews Did you know that the modern guitar is an instrument that dates back over 4,000 years? The first guitar music was published in 1546, during a time when guitars still had strings made from animal intestines! While guitars have a long history, they are still extremely popular in modern day music. Have you ever wondered how they make the music you listen to everyday? In this activity we're going to make our own guitars, and experiment with the different sounds we can create. Read more
Balloon Magic with Bernoulli's Principle Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 7 reviews Have you ever seen pictures or videos of a roof being blown off a house during a hurricane or tornado? You might be surprised to hear that the roof is actually not pushed off by the strong winds but instead by the air inside the house! This can be explained by Bernoulli's principle, which states that fast-moving fluids or air, such as strong winds, have lower pressure than slow-moving air. In this activity you will demonstrate how balloons can be moved in a similar way. It is not quite as… Read more
Build a Cooler Log in to add favorite More Menu
STEM Activity 1 2 3 4 5 48 reviews How does a cooler keep things cold? Which material makes the best insulation? Try this project to find out how long you can keep an ice cube from melting once it's out of the freezer! Read more
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