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Printable science worksheet for Grades 6–12 asking students to write a testable hypothesis on a health or disease topic using if-then-because format.
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Writing a Hypothesis

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This printable science worksheet guides students in 6th–12th grades through writing a single testable hypothesis using the if-then-because format. Students choose a health or disease topic, design an experiment using low-cost materials completable in two hours, and explain their biological reasoning. Useful for teaching the scientific method, prelab planning, or as a foundation for hands-on lab investigations.

Subject:
Science
Topic:
Scientific Method
Grade Level:
6th – 12th Grades
Updated February 2026

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