Eighth Grade Science Projects (Page 40)

Under Pressure: Does a Child's Blood Pressure Depend on His or Her Age?

Science Fair Project Idea

Scientific Method

Every time you go to the doctor's office, the nurse measures your blood pressure. But why does he or she do this? What does your blood pressure tell your doctor about your health? And what exactly is blood pressure? In this life science project, you will learn about blood pressure and what causes it. You will even learn how to take blood pressure readings. Once you learn this skill, you will test a population of children and determine if blood pressure depends upon a child's age. 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

Hey, Do You C My Potatoes? Determining Vitamin C Amounts in Cooked Potatoes

Science Fair Project Idea

Scientific Method

As you know, vegetables not only taste good, but they are good for you. Many vegetables are a great source of vitamin C. Vitamin C is a water-soluble antioxidant that plays an important role in protecting the body from infection and disease. Humans do not make vitamin C on their own, so we must get it from dietary sources. Potatoes, like the ones shown in Figure 1, below, are one good source of vitamin C. Does cooking them affect how much vitamin C they have? In other words, if you boil a… Read more

Smashing for Mash: The Science of Making Memorable Mashed Potatoes!

Science Fair Project Idea

Scientific Method

What do you look forward to when the holidays arrive? Spending time with friends and family? Having lots of free time? How about the delicious food that comes out of the kitchen? You bet! What kinds of food do you have on your table during those special times of the year? For many people, mashed potatoes and gravy are usually on the holiday menu. Whether light and fluffy or smooth and silk-like, mashed potatoes are very satisfying. What is not satisfying is when the cook makes a mistake in… Read more

Gamers: Myth or Man?

Science Fair Project Idea

Scientific Method

Male or female? Fat or skinny? Outgoing or quiet? What is your stereotype of a "gamer"? Do your friends have the same mental picture of gamers? How about your parents? This science fair project will help you examine whether the stereotypes of "gamers" actually matches the reality of who plays video games. Read more

Make Your Own Electric Guitar Pickup

Science Fair Project Idea

Scientific Method

If you like playing electric guitar, this could be a cool project for you. Have you ever wondered how an electric guitar works? In this project you'll wind one or more of your own electric guitar pickups and test them out in an inexpensive electric guitar. How will the sound change with the number of turns you use in the coil? Or with the strength of the magnets you use? Read more

X Marks the Spot: Build a Robot to Protect Your Treasures

Science Fair Project Idea

Scientific Method

You have secret treasure that you need to keep safe from thieves. How do you keep guard 24 hours a day without skipping school and the rest of your important activities? You build a guard robot and have it do the hard work! You can build a guard robot using a LEGO® MINDSTORMS® set and the instructions in this project to guide your efforts. And do not worry: your secret is safe with your robot. Read more

Killing 'Vampires': Saving Money and Power by Turning Off Computer Peripherals

Science Fair Project Idea

Scientific Method

What do you think about killing vampires? No, no, not the kind that drink people's blood, but the kind that suck your power and money away. Equipment like televisions, computers, printers, and fax machines all use electricity to operate, of course, but do you realize that this equipment might still be sucking electricity from the wall, even when you think it's turned off? These electricity-suckers are called vampire loads. In this science project, you will investigate how much power these… Read more

Feeding Fido & Fluffy: Designing an Automatic Pet Feeder

Science Fair Project Idea

Scientific Method

An overnight trip to the beach or a quick two-day vacation can be lots of fun. What do you do to prepare? Pack your clothes, get sunscreen lotion, and borrow a book from the library. But wait! Who is going to feed your dog or cat? It would be irresponsible to let them go hungry. And you can't just leave food out, because it can get stale and start to grow bacteria, which can cause your pet to get sick. Also, it is not a good idea to leave bowls of food out because a pet might overeat, which is… Read more

Enjoy It Now... Or Enjoy It Later? Understanding Delayed Gratification

Science Fair Project Idea

Scientific Method

Have you ever thought to yourself, "I have got to have that new video game right now?" Or maybe there's a new shirt at the store that you just have to have. So you rush home, break into your bank, and gather all of your money, even though you have been saving to buy your mom a gift. But wait! Maybe if you do a few more chores and save for just a few more days, you can gather enough money to buy your mom a gift and buy what you want. This behavior is called delayed gratification and it's what… Read more

Eighth Grade Science Projects (786 results)

Explore Our Science Videos