Fourth Grade STEM Activities for Kids (236 results)

Milk Curdling with Enzymes!

STEM Activity

43 reviews

Have you ever gone to pour yourself a cup of milk, and all you get is clumps? What happened to the milk is called coagulation, which is the mechanism that occurs when proteins in the milk clump together. While you do not necessarily want this in your milk, without coagulation (or curdling), there would be no cheese or yogurt, which is why it is a very important process in the food industry. Wonder how you can make milk curdle? Do this activity to find out! Read more

Mini Golf Physics

STEM Activity

16 reviews

Have you ever played mini golf? It might seem like just a game, but there is a lot of science behind it! Learn about the physics behind a rolling, bouncing mini golf ball and design your own mini golf course in this fun science activity. Read more

Model How Herd Immunity Works

STEM Activity

22 reviews

Have you ever wondered why you need to get a flu shot regularly? The vaccine protects you from getting sick with the flu, which is an infectious disease. Such diseases, like the flu or COVID-19, can easily spread through a population and cause a pandemic by making many people sick. Measures such as social distancing can reduce the risk of catching the disease, but real protection only comes from gaining immunity against the disease. This is the reason for vaccinations—to make someone… Read more

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Make String from Algae

STEM Activity

221 reviews

Did you know that the seaweed you've seen in the ocean or even eaten as a snack is inspiring innovators to imagine new materials? Large brown algae, like kelp, contains polymers—long chains of molecules—that are more environmentally friendly than the ones in most plastics. These natural polymers (alginates) could eventually be used to create sustainable everyday objects. Try your hand at using a bit of chemistry to turn biodegradable polymers from algae into your own custom… Read more

Model the Solar System with Marbles

STEM Activity

60 reviews

What would it be like if you could see the planets of our solar system orbiting the Sun all at once? What about the moons orbiting the planets? Learn how to make your own simple demonstration of gravity and planetary orbits in this fun activity. Read more

Musical Bottles

STEM Activity

20 reviews

Have you ever blown across a bottle's top and made a pleasant, resonant sound? If so, have you wondered how that note is made exactly? The exact note you hear depends on the resonant frequency of the air in the bottle. Musical instruments like ocarinas operate based on a similar principle. In this science activity, you will use bottles to investigate how the volume of the air in the bottle affects the pitch of the note that it makes. Read more

Program Your Own COVID-19 or Flu Simulator with Scratch

STEM Activity

34 reviews

Are you curious about how public health officials think about and model how diseases like flu and COVID-19 move from one person to another? In this activity, you will use the kid-friendly programming language Scratch to write a simulation that uses bouncing dots to represent healthy and sick people. The simulation will show how we can take measures to slow the spread of a transmissible disease. Read more

Seeing in the Dark

STEM Activity

8 reviews

Have you ever considered taking a nighttime nature walk? Would you wait until there is a full moon, so you could profit from sunlight reflected on the moon, or would you rather take a flashlight? Do you think trees would look black, green, or grey in the dark? Do this activity to examine your night vision and prepare for your next nighttime adventure! Read more

Shaping Hard-boiled Eggs

STEM Activity

16 reviews

Have you ever played with your food, creating funny faces or colorful edible artworks? In this activity, you can do just that, but with results you might not expect! You will learn a fascinating way to cook and shape boiled eggs, and explore some interesting chemistry about cooking an egg along the way. While exploring the flexibility of hard-boiled eggs, you will create a delicious, odd-shaped reward! Read more

Small, Tiny, Invisible: How Big Is a Virus?

STEM Activity

30 reviews

Have you ever seen a real virus? Probably not—they are so tiny that it is impossible to see them with your naked eyes. But how big or small are viruses really? The coronavirus Sars-Cov-2, which causes COVID-19, is about 120 nanometers in size. One nanometer is equal to one billionth of a meter! How many of these tiny coronaviruses do you think can you line up inside a pencil dot? In this activity, you will find out by creating a scale model that allows you to compare the size of many… Read more

Soil Science: Study Microorganisms in Winogradsky Columns

STEM Activity

9 reviews

Our planet recycles and reuses everything on it that is needed to support life. It is an amazing, giant recycling system called the biogeochemical cycle. You can actually model this on a small scale by using a plastic bottle and mud to build what is called a Winogradsky column. In this activity, you will build your own Winogradsky columns and investigate how including different nutrients can affect which soil microorganisms flourish and which fail. Read more

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