Question

1. choose the best answer.

in the middle of a chemical experiment, the students leave to eat lunch and hang out. which rule is violated?
being serious in the lab
leaving an experiment unattended
working alone in the lab
eating and drinking in the lab

1. choose the best answer.

a student is conducting a combustion experiment with fire and without help from anyone. which rule is violated?
working alone in the lab
being serious in the lab
eating and drinking in the lab
leaving an experiment unattended

Explanation:

15.

The students left the experiment in the middle, which means the experiment was unattended.

The student is conducting a combustion experiment (which can be dangerous) alone without help.

Answer:

leaving an experiment unattended

16.