Projects, Lessons, Activities (Page 25)

Star light, Star bright: How Does Light Intensity Change with Distance?

Science Fair Project Idea

Scientific Method

Have you ever looked up at the stars at night and wondered how fast they were moving or how far away they were? By studying how the brightness of a star changes with distance, you can answer those questions. In this astronomy science project, you'll create a model of starlight and use a sensor app with your smartphone to discover the key relationship between brightness and distance. Read more

Think Fast! Measure Your Reaction Time!

STEM Activity

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39 reviews

‘Think fast!’ someone says, as they toss a ball toward you. You catch the ball, but do you really ‘think’ about doing it? Probably not! Most likely you raise your hands to catch the ball without ever consciously thinking about it. How does this happen? Lucky for you, your brain is able to react to things in your environment without you having to consciously make a decision about how to react. There are many ways to measure the speed of this type of reaction, and in this… Read more

Turn Mud into Energy With a Microbial Fuel Cell

Science Fair Project Idea

Scientific Method

What can you do with a bucket of soil? You could use it to grow some beautiful plants and vegetables—or you could use it to produce electricity! Surprised about that? You actually can power electric devices with just mud! Are you curious about how this works? You need some little helpers in the soil—bacteria—that are able to turn their food sources within the soil into electricity in a device called a microbial fuel cell. But is this possible with any soil and does the soil… Read more

Are You Left or Right Brained?

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If you write with your right hand, you may also prefer to draw, throw a ball, or eat food with your right hand, but have you ever wondered if your right foot is also more dominant than your left foot? What about your right eye and ear — do you prefer to use them more than your left ones? In this activity, you will get to find out whether people have a sidedness — that is, whether they generally prefer to do activities with one side of their body — and what that might say… Read more

Basketball Physics: Where Does a Bouncing Ball's Energy Go?

Science Fair Project Idea

Scientific Method

Have you ever noticed that when you drop a basketball, its bounce does not reach the height you dropped it from? Why is that? When a basketball bounces, such as on a basketball court, its bounce actually loses momentum by transferring energy elsewhere. This means that to dribble the basketball, players must continually replace the transferred energy by pushing down on the ball. But what happens to the "lost" energy? As we know from physics, energy is not really lost, it just changes form. One… Read more

Blowing the Best Bubbles

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If you have ever tried to make bubbles using plain water, you may have seen that it does not work. This is because the surface tension of water is too high. When detergent is added to water, it lowers the surface tension so that bubbles can form. Other things can be added to this mixture, such as corn syrup or glycerin, to make a solution that is even better for creating bubbles. In this science activity, you will find out which solution creates the best bubbles! Read more

Build a Water Strider

STEM Activity

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Have you ever seen a water strider (also called water bugs, pond skaters, water skippers etc.)? They are bugs that effortlessly hop around on the surface of ponds, lakes, and rivers. How do they do it without sinking? Try this project to find out! Read more

Caffeine and Heart Rate: A Pharmacological Study Using Daphnia magna

Science Fair Project Idea

Scientific Method

In this project, water fleas (Daphnia magna), a semi-transparent freshwater crustacean, are used to study the effects of caffeine on heart rate. Don't worry about having to learn how to take a crustacean's pulse: you can actually see the heart beating under a microscope. Many variations of this experiment are possible. Read more

Crack the Code! Make a Caesar Cipher

STEM Activity

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If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message, or use a secret code that only you and your friend know. Try this activity to learn how to create your own "Caesar cipher," a popular type of code that is easy to learn. Read more

Creating Craters

STEM Activity

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How did the Moon get its craters? What about the craters on Earth? Why do they look the way they do? Find out in this fun science activity, as you make your own craters by dropping balls into a tray of flour. Read more

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