Fourth Grade Science Experiments (Page 198)

Blog Post

In this week's spotlight: a food science activity that may fit right in with any baking you have planned for the season. Are pies on your family's list of favorites or traditions this time of year? How do you like your crust? Does your mouth water for a flaky crust on a homemade pie? In this kitchen science experiment, families can explore the role of fats—and the temperature of the fat—on the texture of a pie crust. When you get ready to mix up a crust, do you take the… Read more

Pedalism and Movement

Science Fair Project Idea

Scientific Method

Humans are bipedal, which means we walk using two legs. This gave humans an adaptive advantage during the evolution of humankind. Being bipedal gave humans additional speed, balance and flexibility used for walking, hunting or traveling long distances. However, we may have lost the ability to climb or swing in trees like other primates. How much faster can you go when you are bipedal? Have a race with your friends using two legs, and then four legs (use your arms as your 3rd and 4th legs).… Read more

Pet Poll: A Taste Test for Fluffy & Fido

Science Fair Project Idea

Scientific Method

Has your dog ever barked, seemingly for no reason at all? Or has your cat ever stopped and carefully smelled a spot that looked perfectly clean to you? Pets, like people, have senses that they use to learn about and to react to their world, but their senses can be stronger or weaker than people's. In this mammalian biology science fair project, you'll study your pet's sense of taste by conducting taste tests and watching how your pet acts to determine his or her favorite type, flavor, or brand… Read more

Phone Book Friction Physics

Blog Post

Explore the physics of friction using sticky notes. What happens when you interleave the pages of two books or pads of paper? Why? The friction between two objects determines how difficult it will be to slide one object across another. Friction accounts for how your feet move across grass, for example, compared to how an ice skate moves across ice. Scientists use both the coefficient of friction and measurement of normal force to talk about how much… Read more

Physics of Vibrations

Science Fair Project Idea

Scientific Method

Tennis racquets, baseball bats and golf clubs all vibrate when they hit the ball. You can often feel it in your hands, particularly if you "mis-hit" the ball. You can find the point(s) on your racquet, bat or club—called the "sweet spot"—that minimize unwanted vibrations. Low-tech method: hang the racquet or bat straight up and down with a string from its handle. Lightly hold the handle with your thumb and forefinger and have a helper sharply tap the bat, strings or club face… Read more

Pick a Card, Any Card

STEM Activity

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Have you ever been playing cards and wished you could use psychic powers to draw the card you wanted? You may not be psychic, but you can still have the power of probability on your side. In this activity you'll investigate the probabilities of drawing specific types of cards from a deck. You'll discover how math can help you avoid the dreaded phrase, "Go fish!" Read more

Picture This: How Visualizing Data Can Lead to the Right (or Wrong) Conclusion

Science Fair Project Idea

Scientific Method

Big data is one of the most promising and hyped trends in technology and business today. Big data refers to data-analysis jobs that are too large and complex to be analyzed by applications that are traditionally used. Big data sets hold valuable information. Many publicly available data sets have the potential to improve our everyday lives by giving us insight into the things we care about. How well-equipped are we to extract information from the data? Visualizations and aggregations (or… Read more

Pinwheel Magic: Take a Spin with Animation

Science Fair Project Idea

Scientific Method

Do you enjoy watching cartoons and animated movies? Do you have fun playing video games? What do all of these things have in common? Fantastic computer animation, that's what! It's a cool job to take an interesting story or game and make it more entertaining by animating it. In this computer science project, you won't animate a full-length feature movie, but you will animate a pinwheel—a project that can go a long way toward creating your own longer animations! You will create an animated… Read more

Pinwheel Science: Weekly Science Activity

Blog Post

In this week's spotlight: an energy-focused family science experiment that explores the relationship between the potential power of a wind turbine and the source and location of the wind. Using a pinwheel, students create their own horizontal-axis wind turbine and experiment to see how the pinwheel spins when the wind comes at it from different directions—and how this translates into how much weight the wind turbine can lift. A pinwheel is a simple example of a wind turbine, but with… Read more

Pitch Perception

Science Fair Project Idea

Scientific Method

Do violin students have better relative pitch than piano students? Since the violin requires the player to choose the correct location to stop the string in order to sound the proper note, you might think that violin players would, as a result of practice, have better ear training than piano students. On the other hand, you could argue the opposite viewpoint, since piano students would have the benefit of hearing correct intervals (assuming that the piano is in tune). Which hypothesis do you… Read more

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