High School Science Experiments (Page 120)

Soil Color and Moisture

Science Fair Project Idea

Scientific Method

Have you ever taken a step onto what appeared to be dry ground, only to find yourself ankle-deep in mud? Yuck! When you walk through damp soil, it can be a very messy experience. How can you tell if soil is wet or dry before you step on it? In this science project, you will investigate whether the color of the soil can help you determine how dry or wet it is. Read more

Soil Science: Study Microorganisms in Winogradsky Columns

STEM Activity

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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

Solar Power Roundup

Blog Post

Hands-on STEM projects for K-12 students interested in alternative energy and the power of the Sun. Solar Science Projects for Students A Cool Way to Make Electricity: Solar Cell Power Output vs. TemperatureAre You in Hot Water? Use the Sun's Energy to Heat Your Own WaterBuild a Solar-Powered BristlebotCold Room? Heat It Up with A Homemade Solar Air HeaterFrom Brine to Beverage: Solar-Powered Salt RemovalGet Something for Nothing: Free Power from the Sun!How Does Solar Cell Output Vary… Read more

Solution Science: Candy Chromatography

STEM Activity

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Do you have a favorite M&Ms or Skittle candy color? Have you ever wondered what dyes are used to make that particular color? Some candies are the color they are because of a single food coloring, while others may use a couple different dyes to create just the right appearance. In this activity you’ll get to do some scientific detective work at home to investigate which colored M&M’s candies use which dyes. If you have some M&M’s leftover… Read more

Sound Science with a String and a Hanger

Blog Post

In this family STEM activity, students explore how sound waves travel. Do some materials transmit sound better than others? What Sound Does a Hanger Make? A pair of walkie talkies made with metal cans (or paper cups) and string can be surprisingly effective in transmitting sound across a long distance—more effective than just talking to someone across the same distance. But why? What do homemade walkie talkies do to sound? In this family science activity, students use simple… Read more

Space Science & Mars STEM Lessons and Activities

Blog Post

Use these free STEM lesson plans, projects, and hands-on STEM activities to explore space science and the solar system with students. These science projects, STEM activities and NGSS-aligned lesson plans help educators create hands-on learning opportunities to teach about space science, the solar system, and Mars, in the context of the Perseverance rover. At the bottom of this resource, you will find a list of independent space science projects… Read more

Spinning Colors: How Do Primary Colors Combine to Make New Colors?

Science Fair Project Idea

Scientific Method

Did you know that sunlight can actually be separated into the colors of the rainbow? And the light of different colors can be added together to make white light or new colors. This is an area of study where art and science overlap. In this science fair project, you will explore this area by drawing or painting "pie slices" onto a white circle and then combining them to make a new color by spinning the wheel using an electric drill. Read more

Spring Break Science: STEM at Home

Blog Post

STEM activities are a great idea for Spring Break. Fun, hands-on science activities can be done together as family activities or as individual explorations. Check our Spring Break collection for suggestions. With more than 1,100 free science, technology, engineering, and math (STEM) projects and activities, picking just a few to suggest for Spring Break isn't easy! We've collected some fun favorites and some awesome new STEM activities to inspire you and your kids to do science over the break.… Read more

Sprouting Sweet Potatoes Slips

Science Fair Project Idea

Scientific Method

Have you ever enjoyed eating a tasty sweet potato? They can be served as yummy mashed sweet potatoes with melted butter, turned into golden-brown sweet potato fries, or prepared in many other scrumptious ways. Did you know that you can make a sweet potato grow into a sweet potato plant, and grow several sweet potatoes this way? In this science project, you will grow your own sweet potato plants and investigate what part of the sweet potatoes is needed to grow the plants. Read more

Squirmy Wormy: Which Soil Type Do Earthworms Like Best?

Science Fair Project Idea

Scientific Method

Do you think worms are gross? Or that they are only good for birds or fish to eat? Well, in this zoology science project, you will find out that this lowly animal helps to put food on your table, too, by all the hard work that it does in the dirt. In this science project, you will discover in what kind of soil it likes to do its work. It is wiggly good fun! Read more

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