Seventh Grade Science Experiments (Page 121)

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Have you ever played with a toy pinwheel, or seen larger real-life versions like a windmill or wind turbine? Have you wondered why all the blades are symmetric? Why can’t they get away with just one blade? Try this project to find out! Read more

Spot the Fat in Your Snack

STEM Activity

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Do you love potato chips? If you do, you are not alone. Potato chips are a very popular snack food. In fact, many people eat more than one bag of chips per month. When eating potato chips, have you ever noticed that your hands get really greasy? Maybe you have heard people telling you not to eat potato chips because they are bad for you and contain too much fat. But is this really true? Do this activity and find out by making the fats in potato chips visible. Read more

Spread the Soap, Not the Germs

Science Fair Project Idea

Scientific Method

Do you wash your hands? You should— it's the best way to prevent the spread of germs. But germs can be tricky; they find nooks and crannies to hide in, so it takes good hand-washing technique to get rid of them. In this science project, you'll investigate which parts of the hand are the most difficult to wash germs off of. Read more

Sprouting Sweet Potatoes Slips

Science Fair Project Idea

Scientific Method

Have you ever enjoyed eating a tasty sweet potato? They can be served as yummy mashed sweet potatoes with melted butter, turned into golden-brown sweet potato fries, or prepared in many other scrumptious ways. Did you know that you can make a sweet potato grow into a sweet potato plant, and grow several sweet potatoes this way? In this science project, you will grow your own sweet potato plants and investigate what part of the sweet potatoes is needed to grow the plants. Read more

Squirmy Wormy: Which Soil Type Do Earthworms Like Best?

Science Fair Project Idea

Scientific Method

Do you think worms are gross? Or that they are only good for birds or fish to eat? Well, in this zoology science project, you will find out that this lowly animal helps to put food on your table, too, by all the hard work that it does in the dirt. In this science project, you will discover in what kind of soil it likes to do its work. It is wiggly good fun! Read more

Squishy Robot Simulator

Science Fair Project Idea

Scientific Method

What do an octopus, an elephant's trunk, and an earthworm have in common? They are all squishy, bendable and flexible because they do not have any bones inside. You might not typically think of robots as "squishy," but scientists are increasingly trying to create soft robots that look and move like animals. In this project you will use a "soft robot simulator" to design and race your own squishy robots. Can you come up with the fastest design? Read more

Stargazing for Satellites

STEM Activity

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Throughout history, people have always been captivated by celestial objects like stars, planets, and the Moon. Now, man-made satellites have entered the picture. Did you know you can see many satellites with the naked eye? Try this activity and find out for yourself! You will even learn how to classify them! Read more

Static Science: How Well Do Different Materials Make Static Electricity?

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Have you ever noticed that some types of clothes are more susceptible to static cling than others? For example, a wooly sweater can have a lot of static cling, but clothing made out of cotton doesn’t get static cling nearly as much. How well do other materials around the house produce static electricity? In this science activity, you’ll explore this by making a simple, homemade electroscope and testing it out. The results may shock you! Read more

Statistical Science: M&M Math

STEM Activity

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Have you ever wondered weather the outcome of a certain activity is predictable? For example, if you’re randomly picking a chocolate out of a box of mixed chocolates, can you predict how likely it is that you’d end up with a specific type of chocolate, such as a caramel-filled chocolate? To investigate this tasty topic, in this activity you’ll determine the frequency of different colored M&M’s in a package of M&M candies. M&M’s are… Read more

Stepping Science: Estimating Somebody’s Height from Their Walk

STEM Activity

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Have you ever noticed you need to walk faster just to keep up with some people, or decrease your pace to walk with other people who are going slower? This is likely because of the difference in leg length between you and the person you are walking with. In this science activity, you’ll get to investigate just how much faster or slower different people walk, and see if you can use the relationship between a person’s walking pace and their height to estimate your own height. Read more

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