using open flames to heat all materials keeping your cell phone on the laboratory countertop knowing where your instructor/laboratory leader is at all times removing your safety glasses when moving from station to station
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which would be a safe practice to exercise during laboratory investigations?
Possibilities:
- using open flames to heat all materials
- keeping your cell phone on the laboratory countertop
- knowing where your instructor/laboratory leader is at all times
- removing your safety glasses when moving from station to station

knowing where your instructor/laboratory leader is at all times