Fourth Grade Science Experiments (Page 18)

Build Obstacle-Detecting Glasses for Visually Impaired People

Science Fair Project Idea

Engineering Design Process

Many visually impaired people use canes to detect obstacles at ground level. What about detecting an obstacle at face level, like a tree branch? What if you need to keep both your hands free and cannot hold a cane? Solve both problems at once with these obstacle-detecting glasses! The glasses use an ultrasonic sensor to measure distance and a buzzer to alert the user of nearby objects. You can customize the design to add or swap out features, like using a vibration motor instead of a buzzer.… Read more

Can Plants Stop Soil Erosion?

Science Fair Project Idea

Scientific Method

Soil erosion can cost the world billions of dollars every year by washing pollutants into our streams and rivers and by causing the loss of farmland. What can you do about this problem? Help save the world (and some money!) with nothing more than a few plants! Read more

DIY Popsicle Stick Drone STEM

Blog Post

Series of STEM activities guides students in building and experimenting with a popsicle stick drone. From a beginner build to adding advanced Arduino controls, follow along to build and test your own mini drone! Drones can be fun (and challenging!) to fly. A drone's hovering flight may look effortless, but whether you've experimented with a drone indoors or outside, you know that a lot goes into expertly navigating a drone to keep it in the air and… Read more

Make Yogurt Spheres Using Molecular Gastronomy

Science Fair Project Idea

Scientific Method

Imagine if instead of spooning up a bowl of soup, a container of yogurt, or a cup of pudding you could just pick up and pop in your mouth a round, mess-free, ball-like blob of one of those. It might feel like snacking rather than eating a meal! In this food science project you can try exactly that. The simple step-by-step directions will lead you through trying a fun cooking technique called reverse spherification to turn yogurt into semi-solid balls, which are called "raviolis." How do you… Read more

Measuring the Amount of Acid in Vinegar by Titration with an Indicator Solution

Science Fair Project Idea

Scientific Method

Have you ever wondered why some foods taste really sour? Vinegar is one example that you might know from salad dressings or pickles. They taste pretty sour, right? There are many different types of vinegar that you can buy to use around the kitchen for cooking and pickling. The chemical compound that gives vinegar its tart taste and pungent smell is acetic acid. Do you think all the different vinegars contain the same amount of acetic acid? Are there some that are more sour than others? How… Read more

Teach About Biodiversity with Free STEM Lessons & Activities

Blog Post

Use these free STEM lessons and activities to talk about habitats, ecosystems, food webs, and more as you explore biodiversity with K-12 students. Biodiversity, the "biological diversity" of our planet, is key to human survival. There are an estimated 8.7 million species of plants and animals on Earth, but biodiversity is more than just a count of how many different types of plants and animals (species) exist in an area or on the planet.… Read more

15+ Plant Science Activities and Lessons

Blog Post

Use these free lesson plans and activities to teach students about plant science—hands-on STEM options for all grade levels! Plant science, botany, plant ecology, and plant biology can be introduced to students and explored at all grade levels. To support you in teaching K-12 students about plant science, we have a range of resources that can work well in a wide range of settings: Lesson Plans Activities Student Projects Related… Read more

20+ Color Science Experiments

Blog Post

Dig into the science of color with colorful, color-changing, eye-catching science experiments! 23 Color Science Experiments and STEM Activities for Science Class and Science Fair Some experiments are "colorful" because they use colored water, paints, or other materials as part of the demonstration of science concepts. The collection of student science fair projects and STEM learning resources highlighted here is "colorful" in a different way. These… Read more

6 STEM Activities to Teach about Thermal Energy and Heat Transfer

Blog Post

Use these free STEM activities help students explore thermal energy and heat science. Free STEM Activities to Teach about Thermal Energy and Heat The following hands-on science activities from Science Buddies' library of STEM Activities for Kids can be used with students in or out of the classroom to explore thermal energy and heat science: Bake Your Ice Cream: discover how meringue can serve as an insulator to prevent ice cream from melting in the… Read more

Are Fingerprint Patterns Inherited?

Science Fair Project Idea

Scientific Method

Have you ever looked at two girls and thought they looked so similar that they must be sisters? What about a father and his son — have you ever seen a boy who looked just like how his father did when he was younger? We can often tell that two people are related because they appear to have several similar physical traits. This is because children receive half of their DNA — their genetic blueprints — from each parent. What about fingerprints — are they an inherited trait?… Read more

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