Second Grade Science Experiments (Page 152)

Growing a Soil Menagerie

Science Fair Project Idea

Scientific Method

Everything on our planet is connected together, linked by a giant recycling system called the biogeochemical cycle. It is an amazing process. You can actually investigate how our planet recycles and reuses everything needed to support life by making a small model of the biosphere. What will be important to include in your miniature system so that it can support different types of life? Read more

Guitar Jingle: Discovering the Locations of Harmonics

Science Fair Project Idea

Scientific Method

Did you know that your guitar has a secret? Yes, that's right—hidden along each string are special places where you can play harmonics and make your guitar sound like a bell! In this music science fair project, you'll find out where the main harmonics are located on a guitar, and then see how those locations are related to the length of the strings. So get out your guitar—it's time to ring in a science fair project! Read more

Gumdrop Geometry: Doing Fun Science at Home during School Closures (Activity #15)

Blog Post

Follow along with a Science Buddies parent who is using family STEM activities to keep her kids learning at home during the COVID-19 school shutdown. New posts every Monday, Wednesday, and Friday. Today's adventure... building geodesic domes and other gumdrop geometry structures. Geometric structures of varying sizes made from toothpicks and gumdrop candies Math and Science Go Hand-in-Hand From the beginning of our learn-from-home STEM adventure… Read more

Half-Life with Coins

STEM Activity

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You may have read about nuclear disasters at sites like Chernobyl, Three Mile Island and Fukushima in the news or in a history lesson. Disasters like these can take years or even decades to clean up, and make it unsafe for humans to live nearby for even longer. Why does the contamination last so long? In this (perfectly safe!) activity, you will learn about radioactive decay using coins. Read more

Hands-on Shopping: More Likely to Buy if You Can Give It a Try?

Science Fair Project Idea

Scientific Method

Did you know that the average child sees 20,000 30-second TV commercials in just one year? That's a lot of encouragement to buy new toys, clothes, entertainment, and food. In this behavioral science fair project, you'll find out some other ways (besides commercials) that marketers use to try and get adults to buy products, like having them touch or hold an item. You'll find out if these methods work with kids, too, and if they increase how much people are willing to pay for a product. It's a… Read more

Hello, Noise: Doing Fun Science at Home during School Closures (Activity #11)

Blog Post

Follow along with a Science Buddies parent who is using family STEM activities to keep her kids learning at home during the COVID-19 school shutdown. New posts every Monday, Wednesday, and Friday. Today's adventure... constructing a rubber band guitar. Quarantine with Kids is Not Quiet How's it going at your house? Are you managing to find moments of quiet? I've given up. In my house, quarantine is noisy. There are arguments, video game music,… Read more

Hey, Do You C My Potatoes? Determining Vitamin C Amounts in Cooked Potatoes

Science Fair Project Idea

Scientific Method

As you know, vegetables not only taste good, but they are good for you. Many vegetables are a great source of vitamin C. Vitamin C is a water-soluble antioxidant that plays an important role in protecting the body from infection and disease. Humans do not make vitamin C on their own, so we must get it from dietary sources. Potatoes, like the ones shown in Figure 1, below, are one good source of vitamin C. Does cooking them affect how much vitamin C they have? In other words, if you boil a… Read more

Hey Gear Heads! The Physics of Bicycle Gear Ratios

Science Fair Project Idea

Scientific Method

If you have a multi-speed bike, you know that you can make it easier or harder to pedal just by shifting gears. Ever wonder how that works? You can investigate this a number of ways. A basic approach is to use a selection of spools of thread (with different diameters), a board with two nails, and a rubber band. Place a spool over each nail, and put the rubber band over them. Mark the 12:00 position on each spool so that you can count revolutions. Turn one spool through a full circle and… Read more

Hey, There's Corn in My Candy!

Science Fair Project Idea

Scientific Method

If you browse through a candy cookbook, you might notice that many of the recipes call for corn syrup in addition to sugar. Both sugar and corn syrup are sweet, so why do you need corn syrup if you already have sugar? In candy making, corn syrup is known as an interfering agent. But what does this mean and how does it work? You can find out for yourself by making two batches of rock candy, one with corn syrup and one without. For example, you could alter the science project When Science is… Read more

Hit Boxes: How Size Affects Score

Science Fair Project Idea

Engineering Design Process

Video games come in many varieties: aim-and-shoot games, city-building games, racing games... the list goes on. In many, you get points for colliding with or hitting something. In this computer and video games project, you will learn about how hit boxes are used to detect collisions and you will determine if the size and placement of a hit box affects the score in the game. Read more

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