Physics Science Experiments (Page 21)

Science Fair CSI: Can You Predict the Spatter?

Science Fair Project Idea

Scientific Method

There is evidence to be gathered at every crime scene. The hard part is making sense of it all. That's where crime scene investigators and forensic scientists come in. In this science fair project, you will investigate blood spatter using fake blood. Your job, as an impartial scientist, is to deliver facts so that justice can be served. Are you up to the challenge? Read more

Science with a Smartphone: Accelerometer

STEM Activity

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Have you ever played a video game with a controller that used motion controls? Do you ever wonder how sometimes your phone seems to “know” that you’re moving? How do these electronic devices measure your motion? Try this activity to find out! Read more

Science With Your Smartphone : Decibel Meter

STEM Activity

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Did you know that you can use your phone as a scientific instrument to explore the world around you? Your phone contains tons of built-in electronic sensors that can measure things like sound, light, motion, and more! In this project you’ll use your phone’s microphone to examine the loudness of different sounds in your environment. How quiet is a library? How loud is that truck roaring by? Try this activity to find out! 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

Skiing and Friction: How Does Ski Wax Affect the Sliding Friction of Skis?

Science Fair Project Idea

Scientific Method

You can model this with an ice cube sliding down a plank: how high do you need to lift the end of the plank before the ice cube starts to slide? Try this with one side plain wood and the flip side waxed wood (use paraffin wax, candle wax or ski wax). Make sure both sides are equally smooth to start with. Do at least three trials. More advanced: using what you know about the forces acting on the ice cube, derive equations to calculate the coefficient of friction for each case. Variation: chill… Read more

Slinking Slinkies

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Have you ever watched a Slinky "walk" down a flight of stairs and wondered how it works? It's a fascinating thing to see and a big part of the Slinky's appeal. These spring toys have been popular for well over half a century; your parents, or even grandparents, may have played with them. Slinkies not only make fun toys, they are also great for doing physics and engineering activities. In this activity you will investigate how the angle of an inclined plane affects how well a… Read more

Slip Sliding Away: Experimenting with Friction

STEM Activity

Have you ever driven up a mountain, seen a sign reading "Hazard! Icy Roads Ahead," and wondered why ice makes roads dangerous to drive on? The answer has to do with friction—specifically, the lack of it. Specifically, in the case of driving a car down the road, the friction that allows the car to move occurs between the tires and the road. This friction normally allows the car to "grip" the road—keeping the tires in contact with the relatively rough road… Read more

Slippery Science: Explore Friction by Launching Stuff

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Have you ever tried to get a running start and slide across a smooth, wooden floor while wearing socks? What happens if you try the same thing on a carpeted floor, or while wearing shoes? The amount of friction between your feet and the floor surface determines how well you can slide. Some combinations of surfaces, like socks on a wooden floor, produce very little friction. Other combinations, like rubber soles on a wooden floor, produce much more friction. In this project you'll do a much… Read more

Slippery Slopes and the Angle of Repose

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Have you ever seen an avalanche or landslide roll down a hill? Why is it that at one moment, everything seems fine, then suddenly the mountain begins to slump? It has something to do with how the earth or snow is piled up on the mountain. Generally, granular materials such as snow or earth pile up relatively well. However, if the slope angle gets too steep, the materials will start to slide down the slope. This critical slope angle, also called the angle of repose, is different for different… Read more

Physics Science Experiments (223 results)

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