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Rebecca's science teacher loves to have the students in the class conduct experiments. On Monday, they did a chemistry experiment in which they measured and examined different chemicals. The teacher made Rebecca and her classmates wear both safety goggles and gloves. On Wednesday, they conducted a physics experiment that tested how high balls made of different substances bounce. However, on Wednesday everyone only had to wear safety goggles. Rebecca's teacher made the students take different safety precautions on different days is:
What is the dangers are not similar in the two experiments so they require different precautions.