Choosing a topic for a school science fair starts with selecting a project type. Students should first check their school's specific science fair rules to determine what type of projects are allowed. Science projects fall roughly into two categories: investigative or models.

An Investigative Science Fair Project

Investigators set out to find an answer to a problem. They begin with a issue that can be formed into a testable question, known as the hypothesis. The investigator then designs a hands-on experiment to collect data to answer the question.

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