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Seventh Grade Science Experiments (top 2,000 results)

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Which Stars Can You Use for Navigation in Different Parts of the World?
Science Fair Project Idea
Scientific Method
Do you ever wonder how pirates sailed the seven seas? The two most important things a pirate could have (besides a parrot and big hat) were a compass and an accurate watch. Ancient navigators didn't know about compasses, so how did they know where they were going? Could they have used the stars to know which way to go? Read more
Which Type of Water is the Hardest?
Science Fair Project Idea
Scientific Method
Do you want your hair to be shiny after you wash it? Do you want your clothes to stay bright and soft after laundering, and last a long time? You might think that a special shampoo or detergent can make this happen, but in this chemistry science fair project, you'll discover that how well people and things get clean has a lot more to do with the type of water used for washing than any special shampoo or soap. Did you know that water can be classified as either soft or hard? Soft water lathers… Read more
Which Wheat Flour Has the Most Gluten?
Science Fair Project Idea
Scientific Method
Close your eyes for a moment and think about your favorite cake, pasta, and crusty bread. OK, you can open your eyes now, and please do not drool on your computer! What was the cake you pictured like? Was it light and fluffy? Did you imagine pasta with a silky, smooth texture? Was the bread you pictured wonderfully chewy? Did it give your jaws a workout? In this science fair project, you will explore an amazing substance in these foods, called gluten, and discover why these foods, all made from… Read more
Which Wing Design Creates the Greatest Lift?
Science Fair Project Idea
Scientific Method
Have you ever flown in an airplane, or looked up at one flying in the sky, and wondered how such a massive machine can stay in the air? Airplanes can stay in the air because their wings, also referred to as airfoils, generate lift. Engineers use devices called wind tunnels to experiment and test different wing shapes when they design new airplanes. Wind tunnels let engineers make careful measurements of the air flow around the wing, and measure the amount of lift it generates. If you can get… Read more
Whirly Bird Aerodynamics
Blog Post
How does a helicopter stay in the air? In this week's aerodynamics-themed family science activity, students can learn more about helicopters by making and testing simple miniature paper helicopters or whirly birds. Paper whirly birds don't have any mechanical parts, but their structure helps kids better understand how the blades on a helicopter function. What do principles of lift and drag have to do with the spinning of a helicopter's blades? What happens if you add… Read more
Why Are Teens Stressed?
Science Fair Project Idea
Scientific Method
What causes the most stress for teenagers? Is it school? family relationships? peer pressure? worries about the future? Design a survey to find out what contributes to teens' stress levels. Possible variations include: How do teenagers deal with stress? Are today's teens more or less stressed than their parents were as teenagers? Were the sources of stress the same for your parent's generation or different? (Idea from De Biasi, 2003) Read more
Why Do Birds Fly in a V-formation?
Science Fair Project Idea
Scientific Method
Have you ever wondered why geese fly in a V-formation? In this science fair project, you will build a wind tunnel to test how the formation of birds in flight actually affects their flight efficiency. Read more
Why Do Flying Rings Go So Much Further Than Frisbees?
Science Fair Project Idea
Scientific Method
If you've played catch with both Aerobie flying rings and Frisbees, you know that the rings fly much further than the Frisbees with the same throwing effort. Why is that? Investigate the aerodynamics of flying rings and flying disks and find out! Read more
Why Video Game Characters Look Better Today
Science Fair Project Idea
Scientific Method
When you picture video games, you probably picture realistic three-dimensional figures, a lot of color, and a lot of detail, right? Those descriptions do not really describe video games from the early 1980's. So why do video games today look better than video games from the 80's? One major change between then and now is the number of pixels, or dots on the screen, used to represent video game objects. When Nintendo® first introduced the Super Mario Bros game for the Nintendo Entertainment… Read more
Why Winglets?
Science Fair Project Idea
Scientific Method
Have you ever noticed how some jet planes have small, vertical projections as the tips of the wings? They're called winglets. What are they there for? Read more
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