11. horseplay or practical jokes in the laboratory are *\nalways against the rules\nokay\nnot…

11. horseplay or practical jokes in the laboratory are *\nalways against the rules\nokay\nnot dangerous\nokay if you are working alone\n\n12. if a piece equipment is not working properly, stop, turn it off, and tell *\nthe custodian\nyour lab partner\nyour best friend in the class\nthe science instructor\n\n13. when you finish working with chemicals, and other lab substances, always\ntreat your hands with skin lotion\nwash hands thoroughly with soap and water\nwipe hands on a towel\nwipe your hands on your clothes

11. horseplay or practical jokes in the laboratory are *\nalways against the rules\nokay\nnot dangerous\nokay if you are working alone\n\n12. if a piece equipment is not working properly, stop, turn it off, and tell *\nthe custodian\nyour lab partner\nyour best friend in the class\nthe science instructor\n\n13. when you finish working with chemicals, and other lab substances, always\ntreat your hands with skin lotion\nwash hands thoroughly with soap and water\nwipe hands on a towel\nwipe your hands on your clothes

Answer

Brief Explanations:

  1. Horseplay or practical jokes in a laboratory can cause accidents and disrupt the scientific - work environment, so they are always against the rules.
  2. When equipment malfunctions in a lab, the science instructor should be informed as they have the knowledge and authority to handle the situation.
  3. After working with chemicals and lab substances, hands should be washed thoroughly with soap and water to remove any potential contaminants.

Answer:

  1. always against the rules
  2. the science instructor
  3. wash hands thoroughly with soap and water