High School Science Experiments (Page 151)

Does Wet Hair Float or Cling?

STEM Activity

Have you ever noticed how hair moves freely when it is under the water, but clings together as soon as it emerges out of the water? Not only human hair does this; when wet dogs shake themselves after a swim, their hair clings together in strands. Try this activity to see why wet hair is far less fluffy than dry hair! Read more

Dog Toys: What Makes One a Favorite or a Flop to Fido?

Science Fair Project Idea

Scientific Method

Got a pampered pooch in your household? Then you know how much most dogs love their toys. And not just any toy. It has to be that particular beat up ball, gnawed frisbee, or ratty not-so-plush-anymore bunny with only one eye and partial ear remaining. Seems that dogs, like people, have definite preferences for their play things. This fun project investigates what makes a toy interesting to a dog. In these experiments, you and your dog can have some fun while you learn about canine behavior… Read more

Doing Fun Science at Home during School Closures (Activity #17)

Blog Post

Follow along with a Science Buddies parent who is using family STEM activities to keep her kids learning at home during the COVID-19 school shutdown. New posts every Monday, Wednesday, and Friday. Today's adventure... building a cotton ball launcher. Rubber Bands — A Simple Frustration-Easer How is it going for you? I'll be honest, it hasn't been a great day here. Today was one of those days where nothing goes right: four cranky family… Read more

Domino Theory

Science Fair Project Idea

Scientific Method

Have you ever set up a line of dominoes and watched them fall? If you wanted to make your line of dominoes fall faster, do you think you should set the dominoes up with more or less space between them? Set your dominoes up in a straight line, using a ruler to keep the spacing between them constant. Try different spacings at 0.5cm increments. Conduct multiple trials at each spacing, and time how long it takes for a fixed total length of dominoes to fall (e.g., a 1.5 or 3.0 meter length of… Read more

Don’t Forget! A Memorization Exploration

STEM Activity

What did you have for breakfast last Monday? What color is the floor in your favorite classroom? If you don’t remember the answer to these questions, that’s ok! Your brain is doing exactly what it is supposed to do. Our brains are nearly perfect storage devices, and part of their perfection is that they know which information to store, and which to throw away. Imagine your house if you never threw anything away – how quickly would it become full of garbage and waste? Your… Read more

Don’t Forget! Test and Trick Your Short Term Memory!

STEM Activity

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If someone tells you to remember a phone number or address, it can feel like an easy task at first. You repeat the numbers to yourself, either aloud or in your mind. But after just a few seconds, you may find yourself starting to doubt your own memory. Was it 5-7 or 7-5? Our minds are always seeking new and useful information, and as a result, it will try to ‘throw away’ information that seems old or irrelevant, such as a random string of numbers or an address. However, there are… Read more

Don't Stand So Close To Me! An Investigation into Personal Space

Science Fair Project Idea

Scientific Method

How do you feel when a friend comes too close to you? How far away or close do you think is necessary to have a conversation with someone? The answers to these questions are dependent upon the size of your personal space. Some people like to be within a foot of each other when having a conversation and others feel that being 3 feet apart is still just a little too close for comfort. Personal space is defined as the protective area surrounding a person's body (not necessarily spherical in… Read more

Drag Racing in the Water

Science Fair Project Idea

Scientific Method

It's fun to go swimming! To feel the power of your body as you launch yourself into the water. But did you know that swimming isn't just about skill and athleticism? The human body consists of skin, contours, and curves. How the water moves along your body and the clothing you are wearing determines how fast you can go. In this science fair project, you will investigate the effects of a force called drag. You will compare the time it takes to swim 25 meters in a swimsuit versus swimming the… Read more

Draw a Spirograph with a Raspberry Pi

Science Fair Project Idea

Scientific Method

Have you ever used a toy like a Spirograph® to draw precise, repeatable patterns on a piece of paper? What if you could use a computer to automatically draw the patterns for you? This project will show you how to do just that using a Raspberry Pi. Check out the video to see what this simple, but fun, project looks like. IMPORTANT: The instructions for this project were originally written using Scratch 2 on a Raspberry Pi 3B+. If you are using a newer Raspberry Pi running Scratch 3, you… Read more

Drawing Circles Around Ants

STEM Activity

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Have you ever had ants ruin your picnic? Commercial ant repellents can keep them away, but who wants to spray poison near their food? In this activity, you can investigate the effectiveness of some less toxic solutions that you may have around your home. Armed with your discoveries, you may be able to keep your next picnic from turning into an ant buffet! Read more

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