Petra dropped her beaker on the floor. She placed her gloves on the table. She then started to pick up the small pieces with her hand and place them in the broken-glass container. At the end of lab, she told her instructor that there was broken glass on the floor. The teacher swept it up and placed the glass in the broken-glass container.Aside from dropping the beaker, how many errors did Petra commit?

Petra made three errors besides dropping the beaker: she placed her gloves on the table, picked up broken glass with her bare hand, and waited until the end of lab to tell the instructor. Broken glass should be handled with a brush and dustpan, and the instructor should be notified right away. The glass container was the correct place for the broken pieces.

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