Seventh Grade Science Experiments (Page 93)

Family Tree Science: Weekly Science Project Idea/Home Science Activity Spotlight

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Do your hands have family traits? Science Buddies Hands-On Projects: Science and Engineering for school and for home In this week's spotlight: a pair of projects in honor of Father's Day and the science of family traits. In these hands-on genetics projects and activities, students investigate a family pedigree to see if they can determine whether traits are dominant or recessive. Do you and some (or all) of your family members share certain physical traits? Is a widow's… Read more

Fantastic Fossilization! Discover the Conditions For Creating the Best Cast Fossils

Science Fair Project Idea

Scientific Method

Have you ever stood close to a fossilized T. rex skull and counted its razor-sharp teeth? Or, have you seen a fossilized stegosaurus skeleton and thought about how it defended itself with tail spikes and armored plates? A trip to a natural history museum lets you imagine what dinosaurs looked like and wonder what life with them on Earth was like. Fossils give us information about animals and plants that lived long ago. Certain places around the world contain more fossils than others. Why? Would… Read more

Fear Factor: Using Pulse Rate to Measure Emotion

Science Fair Project Idea

Scientific Method

Oh, were you ever scared! Your heart pounded, your breath rate shot up, your palms got cold and clammy. Fear does that to us. Here's a science project based on roller coaster rides to see if heart rate is an accurate measurement of fear. Are you brave enough to take on this frightfully fun project? Read more

Flip-book Animation Science: Weekly Science Project Idea/Home Science Activity Spotlight

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Put drawings in motion with a flip book animation science project! Science Buddies Hands-On Projects: Science and Engineering for school and for home In this week's spotlight: a pair of projects that explore the way the brain interprets a series of images. Both traditional cartoon animation and stop motion animation (like claymation) rely on the brain viewing a sequence of images as "in motion." By creating easy and fun flip-book animations, you and… Read more

Flower Pigment Science: Weekly Science Project Idea/Home Science Activity Spotlight

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Use paper chromatography to explore the colors that make up flowers! In this week's spotlight: a pair of flower power projects, perfect for spring and Mother's Day! Paper chromatography is used to help separate a solution into its components. In these hands-on science activities, paper chromatography lets students see what makes up the "colors" of flowers. Are all red flowers the same in terms of pigment? Pluck a few petals and find out! … Read more

Free Power from the Sun!

Science Fair Project Idea

Scientific Method

Do you like getting something for nothing? Everybody likes getting things for free. How about getting energy and power for free? The Sun sends us free energy every second and all we have to do is collect it. Taking advantage of free energy can reduce our dependence on fossil fuels, which are harmful to our environment. In this science fair project, you will work with a solar panel, which is a collector of free energy, and investigate how varying the angle of the solar panel, and thus the amount… Read more

Fresh Whipped Cream That Lasts

Science Fair Project Idea

Scientific Method

Fresh whipped cream is the final touch for many delectable desserts. One issue with fresh whipped cream is that it has to be used soon after it is made, especially if it is at room temperature, or it starts to collapse into goo. This is a problem for its use in frostings or inside pastries as filler. Whipped cream can be stabilized by adding unflavored gelatin. Stabilized whipped cream can be used at room temperature and it has a much longer life. But how much gelatin is just right? Try… Read more

Globs of Gluten: Weekly Science Activity

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In this week's spotlight: a food-themed science activity that helps families explore the role of gluten in baking—and the different levels of gluten content in different types of flour. Many favorite holiday foods contain gluten, from stuffing and rolls to pies and pastries. But their different textures may have something to do with gluten. Extracting gluten from wheat flour can be sticky business, but in this science activity, families can get hands-on with their own gluten balls and… Read more

Golf Clubs, Loft Angle, and Distance

Science Fair Project Idea

Scientific Method

If your idea of a great weekend morning is taking some practice swings at a driving range, or heading out to the links to play a round, this could be a good project for you. This project is designed to answer the question, what is the relationship between club loft angle and the distance that the ball travels when struck. Read more

Growing Great Gardens: Using Human Urine as a Fertilizer

Science Fair Project Idea

Scientific Method

Every day farmers around the world apply commercial fertilizer to their fruits and vegetables to improve plant health and yield. But applying commercial fertilizer is expensive and not economically possible for some farmers in developing countries. What if they could find a way to fertilize plants cheaply? It turns out that human urine is rich in the nutrients that plants need to grow. Could urine serve as a fertilizer substitute? Find out for yourself in this plant growth science project. Read more

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