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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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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
Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!
Third Grade
Physical Science
Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!
Third Grade
Life Science
Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.
Third Grade
Plants, Animals & the Earth
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
Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.
Third Grade
Physical Science
Pair a planetarium visit with this fun art project that mimics the look of far-off galaxies.
Third Grade
Earth & Space Science
Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!
Third Grade
Life 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
This craft is a great way to explore the fascinating world of spiders and their webs as you collect spider webs from around your house with your third grader.
Third Grade
Life 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
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
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

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