Projects, Lessons, Activities (Page 195)

Skating and Angular Momentum

Science Fair Project Idea

Scientific Method

Place a desk chair (one that rotates easily on ball bearings) in the center of the room, away from any obstructions. Put your hands on your lap and have a helper give you a push to start you rotating. You'll need to quantify the results somehow. For example, your helper could measure the number of revolutions you make in 5 seconds. Now try extending your arms after your helper starts you spinning. Next, start with your arms out, and bring them in close to your body after you start… Read more

Sky Science

Lesson Plan Grade: 4th-8th

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"Mammatus clouds and crepuscular rays" © 2007 Brocken Inaglory Why do we see different colors in Earth's sky at different times of day? After this activity, students will be able to support an explanation for the colors we see in Earth's sky with evidence from a scientific model. Read more

Sliding Science: How are Landslides Caused?

STEM Activity

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Have you ever seen a video of a landslide? Landslides are powerful geological events that happen suddenly, causing fear in people who live in areas with unstable hills, slopes and cliff sides. Each year in the United States, landslides can cause billions of dollars in damages, in addition to changing the environment and damaging the surrounding habitats. In this science activity, you will model landslides using a clipboard and pennies, and investigate how friction and the angle of a… Read more

Slimey Likes It! Studying Chemotaxis in Physarum Polycephalum

Science Fair Project Idea

Scientific Method

In this biology science fair project, you will observe how the Physarum polycephalum (P. polycephalum) organism responds to various amounts of glucose. P. polycephalum is easy to grow in a petri dish and responds in complex ways to its environment. Will it grow toward the chemical as it looks for a meal, or will it flee, trying to avoid further contact? Try this science fair project to learn more about chemotaxis in the fascinating Physarum polycephalum. Read more

Slinking Slinkies

STEM Activity

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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

Slippery Science: Explore Friction by Launching Stuff

STEM Activity

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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

STEM Activity

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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

Smart Watering: Adjusting Your Sprinklers for Optimal Soil Moisture

Science Fair Project Idea

Scientific Method

Did you know that you can use more water on your lawn and garden in the summer than you use for all other purposes all year long? If you have an automated sprinkler system for your lawn and/or garden, this project could save money on your family's monthly water bill. You'll also be helping to conserve a precious natural resource: clean water. Read more

Soft Robots with Built-In LEDs

Science Fair Project Idea

Engineering Design Process

Check out the soft robotic gripper and artificial robotic skin projects. These projects show you how to use flexible silicone rubber to make robots or robotic parts. The second project shows you how to connect external LEDs using an Arduino. The LEDs light up when an embedded piece of conductive fabric stretches. What about embedding LEDs in the silicone rubber? You can do this by embedding the LEDs between layers of silicone (Figure 1). The trick is to solder flexible stranded wires to the… Read more

Soft-Boiled Science: Egg-cellently Cooked Eggs

STEM Activity

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Have you ever been in such a rush in the morning that you barely had time for breakfast? Eggs can be a perfect breakfast choice because they can be cooked quickly and in many different ways. Not only do eggs have a spotlight right now because of Easter approaching, but eggs have been commonly eaten for thousands of years, all year round and all over the world. A soft-boiled egg is a choice that many people make. They like the way the thickened tasty yolk coats their hash… Read more

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