Multiple Choice. Click on the button of the best answer.

1. If you see something in the classroom or laboratory that is dangerous, tell the teacher

	When you have time.
	At once
	After class
	After school.

2. Any spill on the floor can cause an accident. Always clean it up

	At once
	During clean up time
	When you have time
	at the end of the period.

3. When you work in the laboratory long hair must be

	Cut off
	Held with both hands
	Kept out of the way.
	Combed nicely.

4. If you are hurt (cut, burned, etc.) tell the

	Nurse at once
	Teacher at once
	Class at once
	Doctor after school.

5. When in the laboratory you should wear

	Sandals
	Closed-toed shoes
	Open-toed shoes
	No shoes

6. If you think there is something wrong with a piece of equipment, stop, turn it off and tell

	the class leader.
	the teacher
	another student
	the custodian.

7. If you break a piece of glassware or other equipment, tell the teacher

	the next period
	At clean up time
	At once
	never.

8. All floors and aisle should be kept clear of

	Teachers and students
	Lab equipment
	Chemicals
	both b and c.

9. If you see a fire in an apparatus, or a burning liquid, it is best to put it out with

	The fire blanket
	Water from the sink
	Your coat
	the fire extinguisher.

10. To put out a fire in a person's hair or clothes, use

	the fire blanket
	a handy chemical
	the wind from running
	the fire extinguisher

11. The correct way to move around the laboratory is to

	run
	walk
	hurry
	skip

12. Helping to clean up the laboratory or classroom is the job of

	new students
	old students
	each student
	the teacher.

13. When you use the laboratory, you should give the procedure all of your

	Interest
	Attention
	Effort
	All of these

14. Chemicals, small parts, and stirring rods are not to be

	held in your hand.
	put in your mouth
	put on the bench
	taken from boxes.

15. If acid gets on your skin or clothes, wash at once with

	sulfuric acid
	Soap
	water
	Oil

16. You must wear your goggles in the laboratory

	to improve your vision
	sometimes
	to avoid myopia
	when instructed to do so

17. Disturbing other students while they are working in the laboratory is

	helpful.
	poor manners.
	dangerous.
	the quickest way to do the job.

18. You should prepare for each laboratory activity by reading all the instructions

	After school
	while you are working
	before you start
	Next week.

19. When heating substances in a test tube, be sure the open end points toward

	yourself
	no other person
	your teacher
	a classmate.

20. Never heat a test tube

	in the lab.
	that is closed
	over a flame
	all of these.

21. To prevent accidents during laboratory activities , you should

	use short cuts
	follow directions
	hurry ahead of others
	ask someone else to do the work.

22. Playing in the laboratory or bothering another person is

	always against the rules
	all right
	Not dangerous
	all right if you are not working.

23. Before you touch an electric plug, switch, or outlet

	your hands should be dry
	ask the custodian
	your hand must be clean
	ask the nurse.

24. To be able to put out a fire safely, you should know

	how to use extinguisher
	where the extinguisher is located
	How to use a fire blanket
	all of these

25. Laboratory aprons are for

	the protection of you and your clothing
	others to put away.
	when you are wearing your best clothes
	wiping your hands

26. In case of fire in the laboratory, notify the teacher at once and then prepare to

	Evacuate the building
	remove flammable materials
	open the doors
	clean the laboratory

27. When smelling a liquid

	inhale deeply
	use the fume hood.
	Waft it toward you
	pour it on the table.

28. Make sure equipment is clean

	before you use it
	after you use it
	both A and B

29. If you are not sure what to do

	guess
	ask the teacher
	sit quietly
	Change partners.

30. The most important thing in laboratory experiments is

	getting the answer right
	finishing first
	safety
	penmanship.

Choose the words that best completes the following paragraph.