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Fourth Grade Science Fair Project Ideas

Building off of what they learned in 3rd grade, 4th graders add a new level of sophistication to their 4th grade science projects. In addition to describing data quantitatively, kids begin to use their observations to formulate scientific arguments and engage in scientific debate. 4th grade science fair projects may involve kids going beyond testing a hypothesis—young scientists can be encouraged to use their results to make predictions about what might happen when the experiment is expanded to test new variables. 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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This project examines the common belief that with increasing age, people are less willing to adopt new technology.
Fourth Grade
Psychology and Sociology
Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.
Fourth Grade
Zoology
This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.
Fourth Grade
Psychology and Sociology
Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!
Fourth Grade
Zoology
Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!
Fourth Grade
Zoology
4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.
Fourth Grade
Zoology
This project examines whether people's taste perception is influenced by what they see.
Fourth Grade
Psychology and Sociology
How do fish breathe? How do gills work? In this science project, learn about aquatic respiration and find a fish's breathing rate in different temperatures.
Fourth Grade
Zoology
Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.
Fourth Grade
Psychology and Sociology
This project explores whether people's choice of a 'random' number is not as random as it seems.
Fourth Grade
Psychology and Sociology
Are crickets affected by temperature? Test your knowledge! This project examines whether temperature has any effect on the chirping of crickets.
Fourth Grade
Psychology and Sociology
Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.
Fourth Grade
Zoology
In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.
Fourth Grade
Zoology

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