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You can experiment with surface tension using just a few household items. Building off of what they learned in 3rd grade, 4th graders add a new level of sophistication to their 4th grade science projects.Try testing different size melons and different height drops. Source: Teeter-Totter The goal of this project is to create a compound machine using pulleys and levers that would be able to lift a Barbie doll up and down by pulling a string by the player.A common problem on the playground is that you sometimes can’t find another person to go on the teeter totter with you. Source: and Test a Paper Bridge This project helps you discover how to create a strong bridge using just paper.The problem is releasing that energy to be able to do some work. When we eat them, the stored energy is converted by our bodies so we can do work.

But is this sensation a result of the mint actually lowering temperatures? Source: Steve Spangler Not only will your little scientist gain a better appreciation for using a helmet, she can also learn more about the science behind it.

With one previous science fair behind his or her belt, your 5th grader is now ready for a little more challenge.

Tornado in a Bottle In this fascinating experiment, water will create a channel as it is emptied from a bottle. Source: Jennifer Elrod Doing an experiment on tooth decay is both beneficial and interesting.

One of the tasks of entering a science fair is to write a background research paper for your project. Basically, it involves finding and organizing information, and then drafting and polishing your paper.

Before you actually begin planning your paper, make sure you know what your teacher requires.

Education.com's selection of fourth grade science fair project ideas are carefully written with 4th graders in mind, giving them the tools they need to effectively learn about the world around them by pursuing the answers to their questions in a methodical way.

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