Question

if you drop or break glassware in lab, first choose... then, choose... finally, place all that material into the choose...

Explanation:

To answer this lab safety question, we rely on standard laboratory safety protocols for broken glassware:

Step 1: First Action

When glassware breaks in a lab, the first priority is to stop any ongoing activity and ensure safety (e.g., check for injuries, prevent others from stepping on shards). However, the most direct first step related to the glass itself is to notify the instructor or lab supervisor (or, in some protocols, immediately begin containing the mess by putting on gloves). But the core first action for broken glass is often to put on protective gloves (to avoid cuts) and then assess, but the standard sequence is:

1. First: Stop, assess safety (e.g., put on gloves if needed) and notify the instructor.
2. Then: Use a brush and dustpan (or tongs) to carefully collect the broken glass (never use hands directly unless gloved and only for small pieces, but brush/dustpan is safer).
3. Finally: Place all collected broken glass into a designated broken glass disposal container (not regular trash).

Filling the Blanks (Typical Lab Safety Answers):

• First: Notify your instructor (or put on gloves)
• Then: Use a brush and dustpan to collect the glass
• Finally: Broken glass disposal bin (or container)

If we assume common lab protocol options (e.g., dropdown choices might include “notify instructor,” “collect with brush/dustpan,” “broken glass container”):

Lab safety for broken glass: 1) First, ensure safety (notify instructor/put on gloves). 2) Then, collect glass with tools (brush/dustpan). 3) Finally, dispose in broken glass container (not regular trash).

Answer:

(Filling the Blanks):

• First: Notify your instructor (or "Put on protective gloves")
• Then: Use a brush and dustpan to collect the glass
• Finally: Broken glass disposal container

(Note: Exact wording depends on the lab’s specific protocol, but this follows standard scientific lab safety guidelines.)