Lab Safety ! with john green !

What two lessons did the speaker learn from his personal lab experiences regarding washing vials and paper towel dispensers?

• Always wear gloves and safety glasses.

• Never wash unfamiliar vials and do not punch paper towel dispensers.

• Always work with a partner and avoid eating in the lab.

• Keep hair tied back and wear closed-toe shoes.

What type of clothing is recommended for safety in a lab environment?

• Short-sleeved shirts and sandals.

• Long pants, closed-toe shoes, socks, and clothing covering the entire torso.

• Muscle shirts and exposed midriffs.

• Loose-fitting clothing with long, dangling sleeves.

Why is it crucial to avoid eating or drinking in a laboratory setting?

• It can lead to spills that damage equipment.

• It distracts from important experimental procedures.

• There is a risk of contaminating food/drinks with hazardous substances.

• It is generally considered unprofessional.

In the Hazardous Materials Diamond (NFPA 704), what hazard category is represented by the blue section?

• Flammability

• Health

• Reactivity

• Specific Hazard

What is the correct method for smelling a chemical in the lab?

• Directly inhaling the fumes from the container.

• Wafting a small amount of vapor towards your nose.

• Placing your nose directly over the opening of the container.

• Tasting a small amount to identify the smell.

Why is pipetting by mouth a dangerous practice in the lab?

• It can contaminate the sample with saliva.

• It can lead to accidental ingestion of hazardous chemicals.

• It is less accurate than using a mechanical pipette.

• It can cause the pipette to break.

What is the safest way to clean up broken glass in a laboratory?

• Picking up large pieces with gloved hands and sweeping small pieces with a broom and dustpan.

• Using a broom and dustpan to collect all pieces, then disposing of them in a sharps container.

• Using a paper towel to pick up all pieces and discarding them in a regular trash bin.

• Sweeping all pieces into a regular trash can with a broom.

What is the general rule for disposing of chemicals after an experiment?

• Always pour them down the sink with plenty of water.

• Dispose of them in any available waste container.

• Always know the correct disposal method before starting the experiment.

• Leave them on the lab bench for the instructor to dispose of.