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4th Grade Science Projects

Easy fourth grade science projects

Do Grapes Sink Or Float? | Salt Water Density Experiment

Do grapes sink or float? Grapes can do both. Whether a grape sinks or floats depends on its density relative to the water it’s in. An object’s buoyancy is determined by its density compared with the density of the surrounding water. Density of water can be changed by adding salt. Let’s try this experiment to …

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Magical Floating Water Trick | Science Experiment

Can water defy gravity and float in midair? Not really, but with some help, it can appear to be. Air molecules, which we cannot see with naked eyes, are constantly moving and bombarding everywhere. The resulting force is air pressure. Normally, the air pressure above and below the water are the same. When equal forces …

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How To Make A Compass For Kids

Compasses are a very important tool explorers. They are useful when you go hiking, camping or other outdoor activities. They help you identify directions so you won’t get lost. Compasses work because there is a giant magnetic field surrounding us on Earth. Did you know that it’s very easy to make your own compass at …

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2 Light Refraction Experiments

Refraction Of Light Have you ever noticed if you look through a glass of water, the image behind the glass sometimes looks funny or distorted? It’s like the glass of water is playing tricks on your eyes. The trick is actually created by the refraction of light. Light travels at different speed through different materials. …

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The Science Of Bubbles – Can You Poke A Bubble Without Popping It?

Little kids love soap bubbles (a lot of grownups do, too!) Blowing bubbles, chasing them, trying to catch them and eventually popping them can provide hours of fun for kids. It’s one of many children’s favorite outdoor activities. Do you know why bubble pop when they are touched? Is it possible to touch a bubble …

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Magnetic Field Force Experiment

Magnetism is invisible, but it’s all around us. There is a giant magnetic field on Earth. In this experiment, we will see a smaller version of magnetic field. We will use iron filings to see the magnetic field in 3-dimension. (Here’s an example on 2-dimensional magnetic force field.) Magnet attracts iron and the magnetism can …

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Magnetic Poles For Kids | Science Experiment

Playing with magnets is always fun. We bought some very strong magnets recently and they are perfect to show what magnetic field looks like. Magnet attracts iron and the magnetism can act through many materials such as paper.  When iron filings are spread over the magnets, you can see the outline of the magnetic force or …

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Why Are Sunsets Red Orange? Science Experiment | STEM (Video)

Have you tried our popular experiment “Why is the sky blue?” experiment? Now the next question is, “If the sky normally looks blue, why are sunsets orange in color?” From the last experiment, we know that when light (representing the sun) passes through a clear fluid (representing air) holding small particles (representing dusts), blue is scattered …

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Water Cycle

What Is Water Cycle? Water cycle is also known as hydrologic cycle or hydrological cycle. It describes how water moves continuously on Earth. Water loops through different stages – evaporation, condensation, precipitation and flow. It then goes back to the evaporation stage. The whole cycle starts all over again and hence the name “water cycle”. Water Cycle …

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