Question

the following footwear is best in the laboratory
○ sandals
○ open - toed shoes
○ closed - toed shoes
○ shoes appropriate for the weather
horseplay in the laboratory is
○ always against the rules
○ okay as long as it was funny
○ not dangerous
if a piece of equipment is not working properly, stop, turn it off and tell
○ the custodian
○ your lab partner
○ your best friend in the class
○ the science instructor

Explanation:

1. For lab footwear, closed-toed shoes protect feet from spills, falling objects, and hazards, unlike open styles.
2. Horseplay in labs creates major safety risks, so it is always prohibited.
3. Malfunctioning lab equipment must be reported to the science instructor, who is trained to handle safety issues and repairs.

Answer:

1. closed-toed shoes
2. always against the rules
3. the science instructor