chem mid term

When should you tie back long hair or baggy clothing?

• When working with chemicals
• When working with a Bunsen burner
• When doing dissections.
• Any time you are working in the lab.

When is it OK to eat or drink in the lab?

• Always
• Never

If you break glassware in the lab, you should...

• Tell the teacher
• Clean it up quickly before the teacher notices
• Scream at the top of your lungs

When in the lab...

• long sleeves and loose clothing should be rolled up
• closed toe shoes should be worn
• long hair should be pulled back
• all of the above

Before leaving the lab you should always wash your hands.

• True 
• False

It's fine to smell chemicals directly from their containers.

• True
• False

If you get something in your eyes, how long do you need to use the eyewash station?

• 15 - 20 seconds
• 5 minutes
• 15 - 20 minutes
• Don't use the eyewash.

 If you do not understand a direction or part of a lab procedure, you should 

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

 After completing an experiment, all chemical wastes should be

• taken home
• dumped in the sink
• disposed of according to your instructor’s directions
• left at your lab station for the next class

You have been injured in the laboratory (cut, burn, etc.). First you should

• apply first aid yourself
• tell the science instructor at once
• see a doctor after school
• visit the school nurse after class