Question

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 window 2. 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 don’t have corrective glasses d any time chemicals, heat or glassware are used 3. 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 4. 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 5. 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 instructor’s directions c dumped in the sink d taken home 6. if a lab experiment is not completed, you should a discuss the issue with your instructor b sneak in after school and work alone c come in during lunch and finish while eating lunch d make up some results 7. you are heating a substance in a test - tube. always point the open end of the tube a toward yourself b toward your lab partner c toward another classmate d away from all people

Explanation:

1. En caso de un accidente en el laboratorio, se debe notificar al instructor.
2. En caso de un incendio en el laboratorio, primero se debe notificar al instructor.
3. Los anteojos de protección se usan siempre cuando se usan químicos, calor o vidrio en el laboratorio.
4. Si se usan lentes de contacto en el laboratorio, se debe avisar al instructor.
5. Si no se entiende una dirección del laboratorio, se debe preguntar al instructor antes de continuar.
6. Los desechos químicos deben desecharse según las indicaciones del instructor.
7. Si un experimento no está completado, se debe hablar con el instructor.
8. Cuando se calienta una sustancia en un tubo de ensayo, la abertura debe estar dirigida alejada de todas las personas.

Answer:

1. A. notificar a tu instructor
2. A. notificar a tu instructor
3. D. cualquier momento en que se usen químicos, calor o cristalería
4. C. avisar a tu instructor de ciencias que llevas lentes de contacto
5. C. preguntar al instructor antes de continuar
6. B. desechar según las indicaciones de tu instructor
7. A. hablar con tu instructor sobre el problema
8. D. alejado de todas las personas