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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 science project challenges students to learn about and classify weeds and discover new practical uses for weeds.
Fourth Grade
Botany
Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.
Fourth Grade
Life Science
Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.
Fourth Grade
Life Science
Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature
Fourth Grade
Life Science
This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.
Fourth Grade
Zoology
This science fair project idea compares biodiversity between drops of water.
Fourth Grade
Life Science
Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.
Fourth Grade
Zoology
Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.
Fourth Grade
Life Science
The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.
Fourth Grade
Microbiology
There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.
Fourth Grade
Life Science
This science fair project idea explores the egg's thin membrane.
Fourth Grade
Life Science
This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.
Fourth Grade
Life Science

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