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Third Grade Science Activities and Experiments

Browse through our Third Grade science activities & experiments. We have many Third Grade science activities to keep your student learning on the fly, all year long. For more in depth science projects, take a look at the Science Fair Project Ideas section of the site.

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In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.
Third Grade
Physical Science
Clouds are formed when warm and cold air meet. Here's a way for kids to see it all up close!
Third Grade
Earth & Space Science
Hatch a praying mantis egg case in a homemade habitat with your child's help! This is an amazing experiment in science and nature for kids of any age.
Third Grade
Nature Activities
Pair a planetarium visit with this fun art project that mimics the look of far-off galaxies.
Third Grade
Earth & Space Science
Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water
Third Grade
Physical Science
Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.
Third Grade
Earth & Space Science
As far as ideas for heliocentric activities go, this collection features all and sundry. Your kid will be inspired to make crafty creations, brew delicious sun tea, and even try out some outdoor games and experiments that will round out any sunny afternoon plan just perfectly. When you're through, your kid might even lament: Please don't take my sunshine away! Even though the sun is millions of miles away, it sure has an incredible impact.
Third Grade
Earth & Space Science
Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.
Third Grade
Nature Activities
Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?
Third Grade
Physical Science
Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!
Third Grade
Physical Science
What causes sound? Hereâs a quick and easy science experiment that helps to add a visual element to the science of sound.
Third Grade
Physical Science
Nature is the greatest teacher, and you can help facilitate the lesson! Here's how to create a supply backpack to get your kid ready for science action!
Third Grade
Life Science
Try the classic balloon-on-wall trick with your kids and watch static electricity in action.
Third Grade
Physical Science
Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.
Third Grade
Physical Science

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