Question

1. flammable materials, like alcohol, should never be dispensed or used near

a. an open door.
b. an open flame.
c. another student.
d. a sink.

1. if a laboratory fire erupts, immediately

a. notify your instructor.
b. run for the fire extinguisher.
c. throw water on the fire.
d. open the windows.

1. approved eye protection devices (such as goggles) are worn in the laboratory

a. to avoid eye strain.
b. to improve your vision.
c. only if you dont have corrective glasses.
d. any time chemicals, heat or glassware are used.

1. if you wear contact lenses in the school laboratory,

a. take them out before starting the lab.
b. you do not have to wear protective goggles.
c. advise your science instructor that you wear contact lenses.
d. keep the information to yourself.

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

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

1. after completing an experiment, all chemical wastes should be

a. left at your lab station for the next class.
b. disposed of according to your instructors directions.
c. dumped in the sink.
d. taken home.

Explanation:

1. Flammable materials can catch fire easily, so they should be kept away from open flames.
2. In case of a laboratory fire, the instructor should be notified first as they are trained to handle such situations.
3. Approved eye - protection devices are worn whenever chemicals, heat or glassware are used to protect eyes from potential hazards.
4. If wearing contact lenses in the lab, it is important to inform the science instructor due to potential risks.
5. If you don't understand a lab procedure, you should ask the instructor before proceeding to avoid mistakes or accidents.
6. Chemical wastes should be disposed of according to the instructor's directions to ensure safety and proper environmental handling.

Answer:

1. B. an open flame.
2. A. notify your instructor.
3. D. any time chemicals, heat or glassware are used.
4. C. advise your science instructor that you wear contact lenses.
5. C. ask the instructor before proceeding.
6. B. disposed of according to your instructor's directions.