Safety glasses/goggles are worn in the laboratory

• to avoid eye strain.
• to improve vision.
• by students who do not have corrective glasses.
• any time chemicals, heat, or glassware is used.

When may a student remove his/her safety glasses or goggles during a lab period?

• when s/he is finished with his/her own experiment.
• when s/he is writing down information while a lab partner handles the chemicals.
• when s/he is waiting for something to cool and not doing anything hazardous.
• only when the experiment is over and all lab materials in the class are put away.

Which type of footware is best (and required) in the lab?

• flip flops
• sandals
• closed shoes
• socks alone (shoes off)

A student is not sure s/he understands the instructions for part of a lab. The best thing to do is

• ask the instructor.
• skip it and go on to the next part.
• watch the person at the next lab station and follow his/her example.
• make a best guess and keep trying different methods until something works.

A student has an idea for a new experiment that s/he would like to try. The student should

• go ahead and try it.
• ask the instructor for permission to try it.
• ask the lab partner for his/her opinion, then try it if s/he agrees.
• forget it-curiosity and new ideas are forbidden.

A procedure calls for 10 ml of a saltwater solution. In pouring, a student mistakenly takes 15 ml of the solution. What should the student do with the excess?

• pour it down the drain.
• pour it back into the bottle.
• pour it into the garbage can.
• use the entire 15 ml in your experiment.
• do what your instructor says to do with the excess

Which can generally be discarded in a sink?

• paper towels
• organic {oily) solvents
• aqueous (water) solutions
• broken glass

Which should be discarded in a regular trash container?

• paper towels
• organic (oily) solvents
• aqueous (water) solutions
• broken glass

Which statement is false concerning the general preparation for a lab activity?

• Set up so that test tubes point toward others in the class.
• Keep papers and books away from lab apparatus.
• Check glassware for chips and cracks, and wash if dirty.
• Read instructions carefully and note any special instructions given by the instructor.

Which statement is false concerning general clean up at the end of a lab activity?

• Wash and put away all glassware.
• Return supplies to designated locations.
• Leave waste materials at your lab station for the next class.
• Wash your hands thoroughly before leaving the lab.