Seventh Grade Projects, Lessons, Activities (Page 103)

The Curdling Properties of Different Milks: How to Avoid Little Miss Muffet's Curds

Science Fair Project Idea

Scientific Method

Has a milk-based soup, sauce, or gravy ever curdled on you (formed lumps) as you were preparing it? Curdling is the process of coagulation that occurs where the proteins in the milk clump together. Sometimes curdling is desirable—for example, if you want to make a delicious cheese or yogurt—but if you are trying to make a milk-based soup or gratin, or if you're adding milk to a hot drink, curdling is very unwanted because you lose the smooth, creamy texture. Nobody likes clumps and… Read more

The Fluffiest Muffins: Flour Type and Muffin Density

Science Fair Project Idea

Scientific Method

Here's a project idea for all of you bakers out there. What happens if you try your favorite muffin recipe with different types of flour (e.g., white, whole wheat, rye, soy, etc.)? Think of ways you can measure the results. How would you measure the density of a muffin? A kitchen scale would definitely be useful for this project, both for measuring the results and for portioning out the batter for equal-sized muffins. What other measures might be of interest? (Nakajima, 2005) Read more

The Great Gravity Escape

Lesson Plan Grade: 6th-8th

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Students use water balloons and a length of string to understand how the force of gravity between two objects and the velocity of a spacecraft can balance to form an orbit. They see that when the velocity becomes too great for gravity to hold the spacecraft in orbit, the object escapes the orbit and travels further away from the planet.Engineering Connection Engineers and scientists make amazingly precise calculations so that a spacecraft's journey is timed exactly to reach… Read more

NGSS Performance Expectations:

MS-ESS1-2. Develop and use a model to describe the role of gravity in the motions within galaxies and the solar system.

The Joly Photometer: Measuring Light Intensity Using the Inverse Square Law

Science Fair Project Idea

Scientific Method

You have probably seen light bulbs with different wattages, for example 50 W or 100 W. Higher-wattage lights are brighter but they also consume more electrical power. Are some bulbs more efficient than others, meaning they produce more light per unit of electrical power? You can find out for yourself by making a simple photometer to compare the light output from different bulbs. This project shows you how. Read more

The Milky Way and Beyond: Globular Clusters

Science Fair Project Idea

Scientific Method

Globular clusters, compact groups of about a million stars that move around together in galaxies, are among the oldest objects found in the universe. Since they are found in most galaxies and since they've been around for so long, globular clusters have a lot to tell us about what the universe looks like now and how it got that way. Is our Milky Way Galaxy just like all the other galaxies out there? What are galaxies made of? What can we learn about the universe from looking at galaxies? … Read more

The Paper Plate Hovercraft

Science Fair Project Idea

Scientific Method

You can make a very simple hovercraft with a stiff, disposable plate-a pie plate should work well-and a balloon. Glue a square of cardboard in the center of the bottom of the plate. Make a small hole through the center of both of these layers. Enlarge the hole slightly with a pencil. Push a balloon through the hole so that the opening is on the front side of the plate, and rest of the balloon sticks out from the back. Blow up the balloon, then set the plate down (balloon side up). What… Read more

The Physics of Cheating in Baseball

Science Fair Project Idea

Scientific Method

Do corked bats really hit the ball further? What about other materials? Here's a project to find out. Read more

The Physics of Follow-Through

Science Fair Project Idea

Scientific Method

This project can apply to soccer, hockey, baseball and many other sports. What is the effect of stopping the kick/shot/swing at the moment of impact vs. following through? Think of a way to measure the outcome in each case, and explain your results. (idea from Gardner, 2000, 83-85; for more information with regard to specific sports, see: Barr, 1990, 12-14; Gay, 2004, 142-144; Adair, 2002, 30.) Read more

The Physics of Martial Arts

Science Fair Project Idea

Scientific Method

"Ay Yaah!" echoes across the room while a loud "thud" signals a powerful kick striking the kick bag. Sound familiar? If the discipline, precision, and power of martial arts is your bag, try this project out for size. You won't be sparring with any opponent other than a swinging kick bag, but you'll learn a few powerful lessons about the physics of efficient kicking. No black belts required; just bring your best form and work up a little sweat while you use your feet to do fun science. Read more

The Physics of Simulation vs Reality

Science Fair Project Idea

Scientific Method

Science Buddies has many projects where you build something with moving parts or do an experiment with the physics of moving objects. Here are just a few examples, but this is not an exhaustive list! You can search our site to find many more. Ball launcher (Figure 1) Marble roller coaster (Figure 2) Rube Goldberg machine (Figure 3) Build A Wall Marble Run (Figure 4) Figure 1. A catapult-style ball launcher. … Read more

Seventh Grade Projects, Lessons, Activities (1,070 results)

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