Fourth Grade Science Experiments (Page 56)

The Point of a Parabola: Focusing Signals for a Better Wireless Network

Science Fair Project Idea

Scientific Method

Have you ever been annoyed by poor Wi-Fi reception for your phone, tablet, or laptop? Do you wish there was something you could do about it? In this project you will learn how to build a parabolic reflector that you can attach to the antenna of a regular wireless router to help boost its signal. Read more

The Science of Making Cheese!

Science Fair Project Idea

Scientific Method

Oooey gooey cheese...yum! Who doesn't like a slice of warm pizza straight from the oven? There's nothing quite like a slice of pizza and a glass of milk, so what makes pizza so great? The cheese! But did you know that making cheese is all about science and chemistry? In this science fair project, you will learn more about the science of cheese making and what kind of milk works best. Try this science fair project and you'll learn about science and get something yummy to eat afterward! Read more

The Scientific Secret of Stretchy Dough

STEM Activity

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Do you remember the last time you baked cookies, bread or cake? Did your baked good turn out perfectly? Or was it a bit too flat, or perhaps rubbery and tough, or maybe with clumps of dry ingredients? The problem might have been in how you mixed the dough, or with the type of flour you used. In this science activity, you will knead, stretch and punch some pretty remarkable doughs and discover what provides structure and elasticity to your baked goods. Next time you prepare dough for… Read more

Turn Plants into Biofuel with the Power of Enzymes

Science Fair Project Idea

Scientific Method

Are biofuels the wave of the future? People often talk about these plant-derived fuels as a way to someday cut down on our dependency on non-renewable carbon-based fuels, like gasoline. Ethanol (a type of alcohol) is a common biofuel used today. In the United States, ethanol is a common biofuel additive to normal gasoline. In fact, some states mandate that when you fill up your gas tank, 10 percent of the total fuel volume be made of ethanol. Brazil, the world's second largest user of… Read more

Use Super-strong Magnets to Make a Simple Motor

Science Fair Project Idea

Scientific Method

In this science project, you will build what might be the world's simplest motor. It has just four basic parts: magnets, a battery, a screwdriver, and a short piece of wire. It takes only minutes to assemble, but it provides a wonderful device to explore how electricity and magnetism combine to produce a fast-spinning motor. Read more

Using a Laser to Measure the Speed of Light in Gelatin

Science Fair Project Idea

Scientific Method

Think it takes expensive, sophisticated equipment to measure the speed of light? Think again! Outfit yourself with a simple handheld laser pointer, a protractor, and gelatin, and you're ready to get started. Read more

Volleyball Machine Challenge

Science Fair Project Idea

Engineering Design Process

Can you build a volleyball machine? It will need one part to launch a ping pong ball over a net and another to return the ball. How many back-and-forth volleys can you get before the ball touches the ground? Looking for inspiration? You can see how other students have tackled this and other annual Science Buddies Engineering Challenges. Teachers, lesson plan versions of this challenge are available. Read more

Want to Make a Video Game? Here's How!

Science Fair Project Idea

Engineering Design Process

Do you love playing video and computer games? Do you dream of someday creating your own? With this science fair project you can turn that "someday" wish into a "today" reality! Read more

Weathering

STEM Activity

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Weathering, or the wearing away of rock by exposure to the elements, not only creates perfectly smooth boulders, sinkholes to swim in, and caves to explore; it also eats away statues and buildings. Try it out on a sugar cube and feel how destructive weathering can be. Read more

What Materials Can Block a Wi-Fi Signal?

Science Fair Project Idea

Scientific Method

Have you ever suffered from poor Wi-Fi reception for your smartphone, tablet, or laptop? Certain materials can actually block a Wi-Fi signal; do you think that could be part of your problem? In this science project, you will do an experiment to find out which materials cause the biggest drop in signal strength from a wireless router. Read more

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