Projects, Lessons, Activities (Page 72)

How Particle Size Determines Chemical Reaction Rate

STEM Activity

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25 reviews

Did you know that flour can explode? Luckily, this does not happen spontaneously on your kitchen counter, but only if the conditions are right. The trick is that you need a very fine powder of flour to make an explosion happen. In fact, any solid flammable material that is dispersed in the air as a dust cloud will explode once it is ignited. Why is that? It has to do with the particle size of the solid material, which determines how rapidly a chemical reaction takes place. In this activity, you… Read more

How Sailboats Stay Upright

Science Fair Project Idea

Scientific Method

Have you ever seen a tall sailboat and wondered how they don't flip over when it's windy? Try this project and learn about the physics behind how sailboats stay upright. Read more

How Sweet It Is! Explore the Roles of Color and Sugar Content in Hummingbirds' Food Preferences.

Science Fair Project Idea

Scientific Method

Do you like to watch hummingbirds? Have you ever wondered why there is specialty hummingbird food? What is it about the food that makes it so appealing? In this zoology science fair project, you will observe these remarkable creatures and learn how color and sugar concentration influence a hummingbird's selection of a food source. Read more

How to Balance Anything

Science Fair Project Idea

Scientific Method

Ever wonder why it is harder to keep your balance with a heavy backpack on? Or why it is difficult to make a toddler's sippy cup tip over? Maybe you are the kind of person who wonders about circus balancing acts and would like to learn how to ride a bike on a rope. Or perhaps you want to know how to make your toy car less prone to toppling over when racing through a sharp curve. In this science project you can learn about balance using marshmallows, skewers, and toothpicks. Sticky, yummy… Read more

How to Design a Great Cat Toy

Science Fair Project Idea

Scientific Method

Do you love animals and want to help keep them healthy? Well, here's your chance to design and tailor a toy that will bring out your pet's most playful nature. In this science fair project, you'll evaluate the skills and activities of your pet and determine what kinds of toys most excite your pet and make him or her lively and curious. So call your furry or feathered friend, and let the frolicking begin! Read more

How to Extract Energy from Grass

Science Fair Project Idea

Scientific Method

Mowing the lawn is hard work, especially on a warm day. Not only do you have to mow the grass, but you also have to dispose of the clippings. Some people add the clippings to a compost pile in their yard, which is a great idea. But did you know that some grasses can be used as a source of energy? In this energy science fair project, you will learn more about a type of energy called biomass energy. You will grow different kinds of grasses and see which type of grass gives you the most biomass,… Read more

Imagine Ways that Artificial Intelligence Could Change the World

STEM Activity

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AI is all around us and changing our world—often for the better, but sometimes with unintended consequences. In this activity, you will imagine and explore the potential benefits and dangers of an artificial intelligence solution you imagine. Let your imagination flow and see where it takes you. Read more

Introduction to Arduino

Lesson Plan Grade: 6th-12th

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This lesson plan will introduce your students to physical computing: the process of building circuits and programming a microcontroller (an Arduino UNO®) to interact with them. The lesson is broken into seven activities that will walk your students through the basics of setting up the Arduino and interacting with circuit parts like LEDs, buttons, and resistors. This introductory material will help prepare your students for more advanced Arduino projects. Read more

Investigating the 'Mpemba Effect': Can Hot Water Freeze Faster than Cold Water?

Science Fair Project Idea

Scientific Method

This physics project seems like it should have an easy answer. Instead, it turns out to be a great illustration of why it is important to base scientific conclusions on the outcome of controlled experiments. Things don't always turn out as we expect! Read more

Is That Really Bacteria Living in My Yogurt?

Science Fair Project Idea

Scientific Method

Have you ever noticed that most yogurt containers say they contain "live cultures"? What does that mean? The label is suggesting that the yogurt has living bacteria in it! While some types of bacteria can make you sick, some are actually important to keep you healthy. But individual bacteria are so tiny that you cannot see one with the naked eye, so how can you tell if bacteria are really living in your yogurt? In this science fair project, you will investigate whether yogurt actually… Read more

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