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Craig Middle School science teacher Norm Yoast ignites acetylene gas within a pumpkin Friday. For five consecutive Halloweens, Yoast has been detonating pumpkins at CMS to teach principles in chemistry and physics.

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CMS science teacher blows up pumpkins for educational purposes

On Friday morning, Norm Yoast addressed his eighth-grade science class by asking students to don safety goggles. Yoast stood at the head of the class. Directly in front of him lay a pumpkin on a pedestal. “There are two types of energy — kinetic energy and potential energy,” Yoast said. “Kinetic energy is anything moving.

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