Question

1. if a laboratory fire happens, immediately *

notify instructor
run for for extinguisher
throw water on the fire
open the windows

1. if you do not understand a direction or part of a lab procedure, you should

figure it out as you do the lab
try several methods until something works
ask the instructor before proceeding
skip it and go on th the next part

Explanation:

1. In case of a laboratory fire, the first - step should be to notify the instructor as they are trained to handle such situations and know the proper protocols. Running for an extinguisher without proper training can be dangerous, throwing water on a fire can be hazardous depending on the nature of the fire (e.g., electrical or chemical fires), and opening windows can fan the flames.
2. If you don't understand a lab procedure, asking the instructor before proceeding is the safest option. Figuring it out as you go, trying random methods, or skipping the part can lead to errors, accidents, or incorrect results.

Answer:

1. notify instructor
2. ask the instructor before proceeding