The document describes an experiment to test which BB size - 2.0g or 1.2g - would be more accurate when shot from an airsoft gun. The student hypothesized that the heavier 2.0g BB would be more accurate due to being less affected by wind. They shot both BB sizes at targets from an airsoft gun equipped with a stabilizer, under parental supervision. The results showed the 2.0g BB was indeed more accurate, confirming the hypothesis that the heavier BB is less impacted by wind.