Question

1. horseplay or practical jokes in the laboratory are

a. always against the rules.
b. okay.
c. not dangerous.
d. okay if you are working alone.

1. if a piece of equipment is not working properly, stop,

turn it off, and tell
a. the custodian.
b. your lab partner.
c. your best friend in the class.
d. the science instructor.

1. if an acid is splashed on your skin, wash at once with

a. soap.
b. oil.
c. weak base.
d. plenty of water.

1. when you finish working with chemicals, biological

specimens, and other lab substances, always
a. treat your hands with skin lotion.
b. wash your hands thoroughly with soap and water.
c. wipe your hands on a towel.
d. wipe your hands on your clothes.
true - false
t f

1. hot glass looks the same as cold glass.
2. all chemicals in the lab are to be considered

dangerous.

1. return all unused chemicals to their original

containers.

1. work areas should be kept clean and tidy.
2. pipets are used to measure and dispense small

amounts of liquids. you should draw the liquid
into the pipet using your mouth.

1. laboratory work can be started immediately

upon entering the laboratory even if the
instructor is not yet present.

1. never remove chemicals or other equipment

from the laboratory.
t f

1. chipped or cracked glassware is okay to use.
2. read all procedures thoroughly before

entering the laboratory.

1. all unauthorized experiments are prohibited.
2. you are allowed to enter the chemical

preparation/storage area any time you need to
get an item.

1. laboratory aprons should be worn during all

lab activities.

1. its okay to pick up broken glass with your

bare hands as long as the glass is placed in the
trash.

1. never leave a lit burner unattended.
2. draw a diagram of your science room and label the

locations of the following:
fire blanket
fire extinguisher(s)
exits
eyewash station
emergency shower
closest fire alarm station
waste disposal container(s)

Explanation:

1. Horseplay in the lab is dangerous and against safety - rules.
2. In case of equipment malfunction, the science instructor should be informed.
3. Splashed acid on skin should be washed with plenty of water to dilute it.
4. After working with lab substances, hands should be washed thoroughly with soap and water to remove contaminants.
5. Hot and cold glass look the same, which can be a hazard.
6. All lab chemicals should be considered dangerous due to potential risks.
7. Unused chemicals should not be returned to original containers to avoid contamination.
8. Clean and tidy work - areas are important for safety and proper work.
9. Pipets should not be filled with the mouth due to chemical ingestion risk.
10. Lab work should not start without instructor presence.
11. Removing lab chemicals or equipment is not allowed.
12. Chipped or cracked glassware is dangerous to use as it can break further.
13. Reading procedures before entering the lab is a good safety practice.
14. Unauthorized experiments are prohibited for safety reasons.
15. Access to the chemical preparation - storage area is restricted.
16. Lab aprons should be worn during all lab activities for protection.
17. Picking up broken glass with bare hands is not safe.
18. A lit burner should never be left unattended to prevent fires.

Answer:

1. A. always against the rules.
2. D. the science instructor.
3. D. plenty of water.
4. C. wash your hands thoroughly with soap and water.
5. T
6. T
7. F
8. T
9. F
10. F
11. T
12. F
13. T
14. T
15. F
16. T
17. F
18. T