Fifth Grade Science Experiments (Page 123)

Sustainable Construction: Building with Mushroom Roots

Science Fair Project Idea

Scientific Method

Does growing your own house sound futuristic? If so, this project might surprise you! An overlap of biology, material science, and environmental science has resulted in some intriguing self-assembling materials. In this project, you will grow one of these materials: mycelium composite. It is made of agricultural waste and mushroom roots. You will explore two ways to grow your own construction material. Try it out and see which method proves to be the strongest! Read more

Sweaty Science: How Does Heart Rate Change with Exercise?

STEM Activity

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Have you ever wondered how many times your heart beats in a year, or will beat throughout your life? Over an average lifetime, the human heart beats more than 2.5 billion times. For a person to keep their heart healthy, they should eat right, not smoke, and get regular exercise. In this science activity, you’ll measure your heart rate during different types of physical activities to find out which give your heart the best workout to help keep it fit. Read more

Teach a Computer to Recognize Road Signs

STEM Activity

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How do driverless cars know how to recognize different road signs? They use something called machine learning. In this activity you will teach a computer to recognize different road signs using photos that you take yourself and a tool called Teachable Machine by Google®. The better the training data, the more accurately the program will be able to recognize different types of signs. Read more

Technicolor Shadows: Lessons in Light and Color

Science Fair Project Idea

Scientific Method

Is that right side of your brain yearning to express its artistic side? This is a project that beautifully blends art with science. Learn about light and colorful shadows in these experiments where you mix and match various colors of light to create a mini light show and shadow wall. You might be surprised at the colorful hues you'll find lurking in the shadows. Read more

Temper, Temper, Temper! The Science of Tempering Chocolate

Science Fair Project Idea

Scientific Method

Nut clusters, chocolate-dipped candies, and chocolate-dipped strawberries are just some of the delicious goodies that have a thin, rich layer of chocolate wrapped around them. But how do pastry and candy chefs make these delectable treats? The first step is to melt and temper chocolate. Tempering is a process in which the cocoa butter in chocolate is hardened into a specific crystalline pattern. When the cocoa butter molecules are in this pattern, the chocolate is shiny and breaks with a sharp… Read more

Test the Webb Space Telescope's Amazing Multiple Mirrors and Sunshield

Science Fair Project Idea

Scientific Method

Can you imagine designing and building a space telescope the size of a tennis court? Believe it or not, that is someone's job! Hundreds of engineers were involved in getting the James Webb Space Telescope (JWST) into space. This telescope has the potential to enable astronomers to see light from when the Universe was first formed. No one knows what amazing discoveries this might lead to, but already, JWST has delivered astounding deep space images that offer an unprecedented look at… Read more

Testing a Parabolic Reflector with Light from an LED

Science Fair Project Idea

Scientific Method

You can see examples of parabolic reflectors in flashlights, car headlights, satellite TV antennas, and even on the sidelines at football games. How do these "dish" antennas work to gather signals? What is the best position for placing the detector for these antennas? In this project, you can use an LED and a simple photodetector to find out for yourself. Read more

Testing Ant Repellents

Science Fair Project Idea

Scientific Method

Has your house ever suffered an ant invasion? This project is an interesting way to investigate what substances are effective as ant repellents. The goal is to find substances that keep ants away, yet are safe for humans and the environment. Read more

Testing How Clothing Choices Impact the Behavior of Others Around Us

Science Fair Project Idea

Scientific Method

Do people treat someone differently based on his or her appearance? Specifically, how are their behaviors affected by the clothes a person wears? For instance, if somebody wears a formal suit, do you think others behave differently when interacting with that person compared to if he or she were wearing casual clothes, like blue jeans? In this science project, you will get to try and find out! Read more

Testing the Hydrating Power of Hydrogel Face Masks

Science Fair Project Idea

Scientific Method

Do you care about the look and feel of your skin? Then you probably know that your skin prefers to be well hydrated (moisturized). Dry skin often cracks, gets inflamed easily, and looks dull. If you go to the store, you will find many skin care products that promise to hydrate your skin. Among them are cosmetic face masks (sometimes called facial masks) that you put on your face to provide the skin with water and nutrients. In this science project, you will make your own hydrogel face masks… Read more

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