Fourth Grade Science Experiments (Page 10)

STEM Activity

1

2

3

4

5

162 reviews

Have you ever wondered where the rain that falls from the sky comes from? You might say the rain falls from the clouds, but what are clouds and where do they come from? All these questions and many more can be answered by looking into how water moves on land and in the atmosphere, which is described in the water cycle. In this activity, you will investigate some of the processes that make water move in and out of the atmosphere by making a miniature water cycle model inside a plastic bag. Read more

Teach About Simple Machines

Blog Post

Use these free STEM lessons, projects, and activities to teach about simple machines with hands-on science experiments to investigate how levers, pulleys, ramps, screws, and wheel and axle systems offer mechanical advantages that make it easier to perform tasks. What Are Simple Machines? A simple machine is a machine with few or no moving parts that makes it easier to perform a certain type of work. Simple machines do not create energy, which must be… Read more

Why Does Fruit Turn Brown?

Science Fair Project Idea

Scientific Method

Have you ever wondered why apple slices turn brown once you cut them, or why a yellow banana gets dark spots over time? In this project you will find out why this happens, and how you can keep your apple slices looking fresh! Read more

Crazy Crystal Creations: How to Grow the Best and the Largest Crystals

Science Fair Project Idea

Scientific Method

Crystals come in all different shapes and sizes. However, the purest and cleanest crystals are usually also the ones that grow to be the largest in size. In this science fair project, you will compare the size and shape of crystals grown in three different temperature conditions: room temperature, in the refrigerator, and in an ice bath. With just water and borax, a household cleaning product, you can discover the best recrystallization method for growing large, pure crystals. Read more

Dissect a Flower

STEM Activity

1

2

3

4

5

88 reviews

Springtime is when nature comes back to life. Trees are growing their leaves again and flowers are sprouting, displaying their beautiful colors and spreading their delightful smell. But have you ever looked at a flower in more detail? What parts do flowers consist of? Are all flowers alike? In this activity, you will find out by dissecting, or taking apart, a flower piece by piece. How many plant parts do you think you can identify? Read more

Do-It-Yourself DNA

Science Fair Project Idea

Scientific Method

All living things have DNA inside their cells. How do scientists extract the DNA from cells in order to study it? In this science experiment you can make your own DNA extraction kit from household chemicals and use it to extract DNA from strawberries. Read more

The Physics of Catapult Projectile Motion

Science Fair Project Idea

Scientific Method

In physics class, you have probably rolled your eyes at some point after being assigned a "projectile motion" homework problem where you use equations to predict how a ball will move through the air. This experiment will show you just how fun that problem can be by using a real catapult to launch a ball and videotaping it as it flies along its path. Then, you will analyze the video and compare it to what the equations predicted. If you have ever wondered if those equations in your physics… Read more

Find the Best Pinwheel Design

STEM Activity

1

2

3

4

5

155 reviews

Wind energy is becoming more and more popular across the United States, maybe you have even seen a wind farm close to where you live! In 2015, approximately 7% of the electricity used in the U.S. was generated by wind, so who knows, when you switch on a light bulb in your house, that light might be coming from wind energy! Wind energy is generated by wind turbines. These machines can look like giant pinwheels, and their job is to turn energy from the wind into mechanical or electrical energy.… Read more

Launching Homemade Baking Soda Rockets

STEM Activity

1

2

3

4

5

122 reviews

Have you ever enjoyed watching something lift off into the air, like fireworks at a show or a spacecraft launching? It can be an amazing experience. It is thrilling to see something lift off against Earth's gravity. To launch a spacecraft, its rockets give it a strong push that is due to a chemical reaction. This means that every time you see a spacecraft launch, you are watching chemistry at work. In this activity you will get to blast an object into the air using two simple… Read more

Teach Genetics and Heredity with Free STEM Lessons & Activities (DNA Day)

Blog Post

Use these free STEM lessons and science activities to explore DNA, heredity, and genetics with K-12 students. How are we like our parents? What makes apples and onions different? Why are some siblings similar in appearance or behavior and others different? How do our genes determine our features and physical characteristics? Can our genes also predict our health or the probability that we will get a disease? DNA holds the key to answering these… Read more

Fourth Grade Science Experiments (top 2,000 results)

Explore Our Science Videos