Which scenario shows poor laboratory safety?

nancy wears her safety goggles over her glasses in lab.
justine notices a chip at the top of the beaker, considers using it, but then asks her teacher if she should use it.
sanjeet brought a change of shoes into lab because he was wearing sandals.
wyatt has low blood sugar, so he brings a granola bar to eat in lab so that he doesn’t have an incident during lab.

Wyatt has low blood sugar, so he brings a granola bar to eat in lab so that he doesn’t have an incident during lab.

Explanation:

To learn and work in a standard laboratory where chemicals are used frequently special measures and precautions should be taken so as to prevent the possible hazards and injuries.

Among the options given, Wyatt has low blood sugar, so he brings a granola bar to eat in lab so that he doesn’t have an incident during lab. is the correct option this is because of the fact that eating in the laboratory can be harmful. As the nostrils and mouth should be remained covered as if this precaution is not taken poisonous gases and air borne microbes may enter inside the respiratory and food digestion passage.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.