Third Grade Science Experiments (Page 171)

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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

Squirrel Obstacle Course: How Far Can Squirrels Jump?

Science Fair Project Idea

Scientific Method

This project idea is inspired by former NASA engineer Mark Rober's "Squirrel Ninja Obstacle Course". You do not need to build a full obstacle course as intricate as Mark's (although you certainly can if you want to!) to make this into a fun science project. For example, how far can squirrels jump? You could test this question by building a mobile post and placing it next to a bird feeder. The bird feeder in Figure 1 is mounted on a metal pole. The pole is protected by a squirrel baffle, a… Read more

Star Wars STEM for May the 4th Be With You

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May the 4th be with you! Tie simple science explorations to Star Wars for Star Wars Day. Connect favorite characters, epic movie scenes, Star Wars lore, and more with hands-on STEM learning in the classroom or for family science with kids at home. May the 4th Be with You (AKA Star Wars Day) May 4th is a day of epic proportions for Star Wars fans. Echoing the classic movie line, the day is celebrated as May the 4th Be with You. (You know, the… Read more

Strength in Numbers: Spaghetti Beams

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Have you ever helped your parents cook a pot of spaghetti? Strands of spaghetti are pretty long, so sometimes people break them in half so they fit into the pot more easily. How exactly does the spaghetti break? And what does this have to do with science? It turns out engineers and materials scientists study how materials break when they are bent. While professional engineers might be more concerned with steel beams in a bridge, you can still do a fun experiment with some pasta in your kitchen. Read more

Stretch It! How does temperature affect a rubber band?

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Have you ever noticed that some objects tend to expand when they get hot, and contract when they cool down? For example, you might run hot water over the lid of a jar that's stuck - this causes the lid to expand, making it easier to twist off. Does this effect work the same way for all materials? Try this fun activity to find out! Read more

Stretchy Balloon Science

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Balloons are fun and come in a variety of sizes, colors, and forms that makes them well suited for decorations, water play, modeling, and other creative activities. But balloons also have uses outside of recreation; weather balloons, balloons used to widen obstructed arteries, and balloons that provide transportation are just a few examples. The first balloons were made of animal bladders or intestines. This made way for the latex, rubber, and nylon fabric balloons we see today. Have you ever… Read more

Stretchy Rubber Band Science: Weekly Science Activity

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What happens to a rubber band's elasticity when the temperature changes? What happens when you heat up or cool down a bunch of molecules? Any exceptions? In this weekly mechanical engineering-themed family science activity, students experiment to find out how rubber bands respond to heating and cooling. Because rubber bands are made of polymer chains, the results may be surprising because a heated rubber band may do the opposite of what you expect! Get… Read more

Student Science for DNA Day

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Help students better understand DNA with hands-on student STEM projects from Science Buddies! Explore DNA, Genetics and Genomics with K-12 STEM Projects: Hands-on STEM with Science Buddies. www.sciencebuddies.org National DNA Day is an annual celebration that marks the completion of the Human Genome Project in April 2003 and the discovery of the double helix of DNA in 1953. At all student levels, there are ways for students to learn more about DNA and… Read more

Study Chirality with a Homemade Polarimeter

Science Fair Project Idea

Scientific Method

Some molecules can be either left- or right-"handed." The left- and right-handed molecules have the same number and type of atoms, and their chemical structures look identical, but they are actually mirror images of each other. Many naturally occurring molecules have this property, called chirality. Chiral molecules can interact with polarized light in an interesting way—they rotate the plane of polarization. This chemistry science fair project describes how to make a homemade polarimeter… Read more

Superbugs and Antibiotics: Explore with a Dice Game

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Stopping the course of an antibiotic early is one way that bacteria develop greater resistance to available medicines. A new classroom activity, sponsored by Cubist Pharmaceuticals, helps students see how populations of bacteria respond to antibiotics. Using a colorful dice game, students roll the dice to see how many bacteria respond to treatment each day. How much harder is it to kill off a superbug? At the end of the game, the students can tell by looking at the dice that… Read more

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