Seventh Grade Science Experiments (Page 151)

Gear Up Your Candy

STEM Activity

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7 reviews

Did you know that gears are all around you? You can find them in wind-up toys, bicycles, carousels, cars and trucks, cranes, drills, wind turbines, analog watches, and so forth! If you've looked closely at a moving bicycle, you have seen gears at work. Are you curious about their purpose? In this activity you will use candy to make gears and explore why they are so versatile. Read more

Gelatin Pearls

STEM Activity

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9 reviews

Do you enjoy getting creative in the kitchen? If so, this activity is for you! Molecular cuisine—taking tools, ingredients, and methods typically used in science and using them in cooking—might sound fancy and complicated, but some techniques are easy to replicate! Get your hands wet, fire up your creativity, and see how rewarding it can be! Read more

Geometry of Goal-Scoring

Science Fair Project Idea

Scientific Method

Block off one-third of a soccer net with a cone, 5-gallon bucket or some other suitable object. Shoot into the smaller side from a set distance, but systematically varying the angle to the goal line. Take enough shots at each angle to get a reliable sample. How does success vary with angle? For a basic project: How do you think your success rate will vary with angle? Draw a conclusion from your experimental results. A bar graph showing success rate at different angles can help to… Read more

Get Saucy with the Thickening Power of Starches

Science Fair Project Idea

Scientific Method

Who doesn't love soaking up the last bit of gravy on Thanksgiving? Or dipping a crusty cube of bread into a cheese fondue? Or scooping up the thick juices from a fruit pie? Sauces make eating a joy! They provide concentrated flavor in a thickened liquid form, with a pleasing texture and consistency that carries or compliments the flavor of the rest of the food. No matter if they're salty, spicy, savory, or sweet, sauces make foods richer and more special. There are many ways to thicken sauces,… Read more

Get Some Practice at 'Fossil' Reconstruction with Owl Pellets

Science Fair Project Idea

Scientific Method

Are you fascinated by dinosaurs, fossilized bones, and fossilized plants? Although this project is not based on actual fossils, you will get good practice at reconstructing an animal's skeleton from individual bones. You'll use what you find to identify the types of prey that owls consume. Read more

Get the Scoop on Stroop

Science Fair Project Idea

Scientific Method

Do you like to read? Did you know that most people read without even thinking about it? Find out in this experiment how a simple reading/color test called the Stroop Effect can show you how your brain works. Read more

Gingerbread House STEM Challenge

STEM Activity

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75 reviews

How easy or difficult is it to build a gingerbread house? It depends on what you want your house to look like. Design possibilities are almost endless! You could make a multi-story building, try different shapes and sizes, or add extra features such as a balcony or chimney. The more complex your design gets, the more difficult it is to make sure that your house stays upright and keeps its shape. In this activity, you will become an engineer and design and build a gingerbread house that must… Read more

Go and Stop? Ant Traffic Signals

Science Fair Project Idea

Scientific Method

Have you ever stopped to watch a trail of ants moving back and forth between a food source and their nest? Have you ever wondered how they establish their trail? You've probably read that ants use chemical signals to communicate with one another. This is a relatively simple experiment that you can do to determine whether ants use attractant signals (positive cues) or repellant signals (negative cues) or both. Read more

Go Fish! Creating an Ocean-Friendly Fishing Video Game

Science Fair Project Idea

Engineering Design Process

Video games are entertainment, but like other such media (say Oscar-winning movies or award-winning books), they can also point out challenges facing people. In this science project, you will design and create a fishing video game that teaches the player about which fish are plentiful enough to catch and which fish are not because their population is declining. Maybe your game can help solve the problem of over-fishing and help sustain healthy fish populations. All while having fun of course! Read more

Go, Gadget, Go! Building Robots with LEGO® Mindstorms®

Science Fair Project Idea

Scientific Method

In the mid-20th century, people thought of robots as futuristic tools. But in the 21st century, robots are not a figment of our imaginations, but are a part of our reality. Robots even perform tasks that humans can't do. In this engineering science fair project, you will use LEGO Mindstorms to build a robot that is fast, lightweight, and stable. Who knows? You might end up building a robot that does housework or even your homework! Read more

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