1. What is laboratory safety?
proper laboratory practices and safe working conditions.
Place where scientific research and development is conducted and analyses performed, in contrast with the field or factory.
the condition of being protected from or unlikely to cause danger, risk, or injury.
A laboratory is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed.
2. What is laboratory?
the systematic study of the structure and behaviour of the physical and natural world through observation, experimentation, and the testing of theories against the evidence obtained.
Place where scientific research and development is conducted and analyses performed, in contrast with the field or factory.
the condition of being protected from or unlikely to cause danger, risk, or injury.
the type of equipment found in a building or room equipped for conducting scientific research or for teaching practical science
3. What is a Hazard?
expected occurrence.
conditions that are likely to cause accidents.
unexpected occurrence .
items showing the risks associated with those items.
4. What is an accident?
conditions that are likely to cause accidents.
expected occurrence
An unexpected occurrence
items showing the risks associated with those items.
5. Which one is not a hazard?
cut and breathing problems
corrosive substances and sharp objects
Slippery surfaces and Electricity
flammable and toxic substance
6. Which one is not a laboratory accidents?
breathing problems
irritation
electricity
slip and fall
7. Which one is an example of corrosive substance?
Spirit
Poisonous chemicals
Acid
wet floor
8. Which one is an example of flammable substance?
spirit
acid
poisonous chemicals
wet floor
9. Which one is an example of toxic substance?
poisonous fumes
acid
naked cables
spirit
10. Which one is an example of sharp objects?
acids
naked cables
blunt nail
razor blades
11. ------- used on containers whose contents can easily catch fire.
toxic
carcinogenic
flammable
corrosive
12. ------- used on containers whose contents can chemically destroy skin.
corrosive
explosive
toxic
flammable
13. ------- used on containers whose contents are life threatening if swallowed.
caution
toxic
radioactive
environmental hazard
14. ------- used to show substances that can cause long term health effect.
caution
carcinogenic
flammable
toxic
15. ------- used to show items that might explode if exposed to fire.
toxic
explosive
explode
caution
16. -------- used to show substances that can cause long lasting environmental effect.
radioactive
environmental accident
toxic
environmental hazard
17. --------------used to show substances that have less serious health effects.
toxic
explosive
caution
corrosive
18. common laboratory accidents include not............
burns and irritation
scalds
burns
cuts
19. There are three types of burns.Which one is not?
low
mild
moderate
severe
20. Which one is not a first aid measures for burns?
bandage with a piece of cloth
remove the cloth from the burned area.
cool the burned area using warm running water.
cool the burned area using cold running water.
21. ..........are caused by naked flames of concentrated acid or bases.
cuts
ingestion
scalds
burns
22. -------- is caused by hot water or steam.
cuts
scald
ingestion
burn
23. ----------caused by broken glass.
burn
ingestion
cuts
scald
24. ...........of harmful substances may result from swallowing poisonous chemicals.
ingestion
burn
scald
digestion
25. The following is not a proper dressing before going to the laboratory.
long hair must be tied up
well buttoned and proper lab coat
shirts and blouses must be untucked
wear closed shoes
26. The following is not a laboratory apparatus.
repair a faulty apparatus
proper disposal off waste after experiment
windows and doors should be open
do not splash water on electric sockets
27. If a fire erupts, immediately........
throw water on the fire.
notify the teacher.
open the windows.
run for the fire extinguisher.
28. Approved eye protection devices (such as goggles) are worn in the laboratory......
to avoid eye strain.
any time chemicals, heat, or glassware areused.
to improve your vision.
only if you do not have corrective glasses.
29. If you do not understand a direction or part of a laboratory procedure, you should........
figure it out as you do the lab.
ask the teacher before proceeding.
skip it and go on to the next part.
try several methods until something works.
30. After completing an experiment, all chemical wastes should be.........
disposed of according to your teacherโs directions.
dumped in the sink.
taken home.
left at your lab station for the next class.
31. You have been injured in the laboratory (cut,burned, etc.). First you should.........
tell the teacher at once.
see a doctor after school.
visit the school nurse after class.
apply first aid yourself.
32. Long hair in the laboratory must be......
always neatly groomed.
cut short.
held away from the
tied back or kept entirely out of the way with a hair band, etc.
experiment with one hand.
33. Which of the following should be worn during a laboratory activity?
googles
sandals
dangling jewelry
loose clothing
34. Horseplay, practical jokes, or pranks in the classroom are...........
not dangerous.
laboratory rules
always against the rules.
okay if you are working alone.
35. When handling animals, students should not......
Scratch them
report bites or scratches to the teacher immediately.
not tease or handle animals roughly.
open cages only with permission.
36. If a piece of equipment is not working properly, stop, turn it off, and tell...........
your best friend in the class.
your lab partner.
the principal.
the teacher.
37. When you finish working with chemicals,biological specimens, and other lab substances, always.....
wipe your hands on a towel.
wash your hands thoroughly with soap and water.
wipe your hands on your clothes.
treat your hands with skin lotion.
38. The following activity is not permitted in the laboratory Except........
Manipulation
eating
chewing gum
drinking
39. When using a razor blade or scalpel, always cut material....
toward you.
away from you.
perpendicular.
in your hand.
40. Before you leave the science room, you should not..........
return all equipment to the proper storage area.
wash your hands with soap and water.
leave your working area disorganized
clean your work area and equipment.
41. If you accidentally wear contact lenses in the lab, what should you do?
Not tell anyone
Not wear goggles
Borrow someone else's glasses
Tell the teacher
42. Which of the following is a proper attire for a science laboratory?
Open-toed shoes
A lab coat
Shorts
Jeans
Explanation:
A lab coat helps protect your clothes from spills and splashes of chemicals.
43. What should you do if you spill a chemical on your skin in the laboratory?
Continue working
Let it dry
Cover it with a bandage
Rinse with water immediately
Explanation:
Rinsing the chemical off your skin helps prevent skin irritation and burns.
44. Which of the following should not be done in a science laboratory?
Running experiments without supervision
Using your phone
Reading the lab instructions
Eating or drinking
Explanation:
Using your phone can distract you from following proper safety procedures and can be a source of contamination.
45. What should you do if you accidentally break glassware in the laboratory?
Inform your teacher and follow the proper cleanup procedure
Ignore it and continue working
Step on the broken glass to crush it further
Use your bare hands to pick up the pieces
Explanation:
Broken glass can cause cuts and injuries. It is important to inform your teacher so that the glass can be cleaned up safely.
46. Which of the following is a proper way to handle sharp objects in the laboratory?
Throw them in the trash bin without a cover
Hold them loosely
Point them towards others
Carry them with care and point downwards
Explanation:
Holding sharp objects carefully and pointing them downwards helps prevent injuries to yourself and others.
47. What should you do if you see a fire in the laboratory?
Run away and inform others
Throw water on it
Use the fire extinguisher if trained to do so
Try to put it out yourself
Explanation:
Using a fire extinguisher when trained can help control small fires and prevent them from spreading.
48. How should you dispose of chemicals in the laboratory?
Leave them on the lab bench
Follow the instructions for proper disposal
Pour them down the sink
Throw them in the trash bin
Explanation:
Improper disposal of chemicals can be harmful to the environment and can pose a safety risk. Always follow proper disposal instructions.
49. What should you do before conducting an experiment in the laboratory?
Hurry to finish quickly
Read and understand the lab instructions
Skip wearing safety goggles
Ignore the safety precautions
Explanation:
Reading and understanding the lab instructions helps you know the safety precautions and procedures to follow during the experiment.
50. Which of the following is a proper way to handle electrical equipment in the laboratory?
Use them with wet hands
Plug in multiple devices in one outlet
Yank the cord to unplug
Keep cords away from water
Explanation:
Water conducts electricity and can cause electric shocks. Keep electrical equipment away from water to prevent accidents.
51. What should you do if you are unsure about a safety procedure in the laboratory?
Ask your classmates for advice
Skip the procedure
Guess and continue
Consult your teacher for clarification
Explanation:
It is important to seek clarification from your teacher to ensure you understand and follow the correct safety procedures in the laboratory.