Seventh Grade Science Projects (Page 25)

Water from Air: Experimenting with Dew Traps

Science Fair Project Idea

Scientific Method

Most of us live in areas where sources of water exist nearby as oceans, rivers, lakes, ponds, streams, reservoirs, wells, or even underground streams. But in some places, like the desert, water is hard to find and a precious resource. In this environmental engineering science project, you will investigate one way that people living in arid regions can collect water inexpensively: dew traps. 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

Is It a Country Ballad? Listen to the Beat!

Science Fair Project Idea

Scientific Method

Have you ever noticed that hip-hop songs have a fast tempo, while country ballads are usually slow? Do you think there is a correlation between the number of beats per minute (bpm) in a song and the type of music? You can explore whether different genres of music have different bpm ranges by measuring the bpm in several different songs from a number of different genres. Bpm can be measured using free music software, like the one listed below in the Bibliography, or by counting all the beats you… Read more

Wild Winds: Detecting Turbulence Around Structures

Science Fair Project Idea

Scientific Method

Watch out! Eddies and vortexes are powerful regions of air and water flow that you have to watch out for in some surprising places. Try out this science fair project to discover why they can be dangerous, as well as where and how to find them. Read more

Race Your Marbles to Discover a Liquid's Viscosity

Science Fair Project Idea

Scientific Method

How do you like your mashed potatoes? Thin and whipped smooth? Or thick and mashed into chunks? Your mouth checks out not just the taste of your food, but its viscosity, or how it flows on your tongue, every time you take a bite! In this science fair project, you'll learn what viscosity is, and how to measure it in common liquids around your home. Read more

Field Goal! The Science Behind a Perfect Football Kick

Science Fair Project Idea

Scientific Method

Did you know that throwing, kicking, and punting a football all involve the science of projectile motion? A star NFL® quarterback, kicker, and punter each need to have a very good understanding of how a football moves through the air in order to help them win games. In this science project, you will set up a rubber band-powered catapult to represent a field goal kicker, and study how changing the distance from the goalposts affects how hard it is to accurately kick a field goal. Read more

Study the Effect of Fertilizers on Algal Growth

Science Fair Project Idea

Scientific Method

You might not know it, but a lake without algae would be a very dull place. If there were no algae, there would be no small animals feeding on the algae, and there wouldn't be any fish eating the small animals that eat the algae. You might conclude that since some algae is good, more algae is even better, but algae growth has a down side. If there is too much algae, they can deplete the oxygen in the water, killing off other species in the water. What is one culprit that leads to algal growth?… Read more

Find the Horsepower of a Toy Car

Science Fair Project Idea

Scientific Method

Have you ever heard someone describe how much horsepower a car has? Why do we use horses to measure how powerful cars are? What exactly is horsepower? How is horsepower related to things like speed and torque? Find out in this fun science project as you use a simple setup to find the horsepower of a battery-operated toy car. Read more

Making Jell-o Stronger

Science Fair Project Idea

Scientific Method

Gelatin! It's hard to think of another food that is used as frequently on the dinner table as off. You can find it in all sorts of sweet foods, from ice cream, yogurt, and gummy bears, to marshmallows and yellow colorings for sodas. Off the table, it shows up in glues, photographic paper, playing cards, crepe paper, medicine capsules, hair gels, and professional lighting equipment. From the kitchen to the theater—what a range of uses! In this cooking and food science fair project, you'll… Read more

Smelly Science: A Sniff Test

Science Fair Project Idea

Scientific Method

Take a deep breath: freshly baked cookies, smoke from a wood fire, or a rose—your nose is an amazing smell detector! Your sense of smell can not only identify a huge variety of odors, but it is also incredibly sensitive. Think about how easily you can detect if someone in your neighborhood has a barbecue just by smelling the hints of smoke from the grill far away. How strong or weak you perceive an odor depends on its concentration. What do you think is the lowest concentration of a… Read more

Seventh Grade Science Projects (753 results)

Explore Our Science Videos