Projects, Lessons, Activities (Page 193)

Teachers Rule!

Science Fair Project Idea

Scientific Method

I am sure you like your teacher, and are quite the teacher's pet! But how do other students in your school feel about their teacher? Will younger students like their teacher more than older students? What other trends can you investigate? Read more

Tee Time: How Fast is Your Golf Swing?

Science Fair Project Idea

Scientific Method

The goal of every golfer is to hit the golf ball as far as possible down the fairway. A key factor in determining the distance that the ball will travel is the velocity of the club when it strikes the ball. In this sports science fair project, you will determine exactly how distance is related to club velocity. Time to tee off! Read more

Testing Gait Symmetry with Uneven Loads

Science Fair Project Idea

Scientific Method

The way humans walk—our gait—is usually fairly symmetrical. Each step we take with the left foot is similar in length and timing to the step with the right foot. This symmetry makes walking efficient and reduces stress on the muscles and joints. But what happens when the body is challenged by an uneven load, such as carrying groceries in one hand or holding a backpack on one shoulder? Biomechanics research shows that unequal weight distribution can disrupt gait symmetry, forcing one… Read more

Testing the Strength of Martian Bricks

Science Fair Project Idea

Scientific Method

For a colony of humans to survive and thrive on Mars, they will need to make the most of what is available on Mars. We know from prior space missions what the Martian ground cover looks like. In this project, you will see if this ground cover can be transformed into strong construction material. The first requirement for construction material is that it is strong so it does not collapse under its own weight. Because the mass of Mars is about 10 times less than the mass of Earth, its… Read more

The Business of Fizziness: Test Your Soda Fizz!

STEM Activity

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You’ve probably seen the reaction that happens when you add Mentos candy to a diet soda. The resulting eruption is powerful enough to be dangerous, and is the source of many online videos! While many people are familiar with this reaction, few of them understand why it takes place. The Mentos + Soda reaction is not actually a chemical one, but a physical one called ‘nucleation’. In this activity we will explore nucleation in soda at a smaller scale by adding some unusual… Read more

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 Effect of Roasting on Color, Flavor, and Texture of Peanut Butter

Science Fair Project Idea

Scientific Method

Peanut butter is a popular ingredient in sandwiches, cookies, and many other common foods. In this cooking and food science fair project, you will roast peanuts in the oven at 350 degrees for 20, 30, and 40 minutes to produce variable levels of color and flavor. Roasting not only adds complex flavors to the peanuts, but it also destroys enzymes that produce off-flavors. Each lot of roasted peanuts will be used to make a batch of peanut butter. You will evaluate each batch of peanut butter for… Read more

The Eye of the Beholder and the Mind of the Beheld

Science Fair Project Idea

Scientific Method

The concept of beauty changes over time and often differs among societal groups. How strongly do societal conceptions of beauty shape an individual's self-image? There are many fascinating questions you could choose to explore with surveys on this subject. For example, how well do girls' ideas of what is attractive in boys agree with boys' expectations about what girls find attractive (or vice versa)? Try your survey with different generations to see how conceptions change over time. If you… Read more

The Freezer: It Keeps Your Carrots Awake at Night!

Science Fair Project Idea

Scientific Method

Brrrr, freezing cold! It's the worst nightmare of any fresh fruit or vegetable! If the produce in your kitchen had legs, they would run in a panic every time the freezer door opens. Why? Well, freezing temperatures are not kind to fresh produce. Freezing kills the plant tissues and alters them on both a chemical and physical level. Chemically, the enzymes in the produce become more concentrated and do not work normally, so that discoloration, off-flavors, vitamin breakdown, and toughness may… Read more

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

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