form 4 science

1. SAFETY
MEASURES IN
THE
LABORATORY

5. Chapter 1 Safety Measures in Lab
1.1 Self Protection Equipment
1.2 Disposable of Waste
ITeach – Science Form 4
SCIENCE FORM 4 KSSM

6. You are able to:
Explain functions at least 9 self-protective
equipment
Identify and justify substances that :
a) can be disposed in the sink
b) cannot be disposed into the sink
Describe at least 3 methods in managing
biological wastes correctly
Explain the steps to manage accidents in
laboratory : a) 4 steps – chemical spill
b) 4 steps – mercury hazard

8. SAFETY
SHOWER
FUME CHAMBER
EYEWASH
STATION
LAMINAR FLOW
CABINET

9. EXERCISE

10. To protect the eyes from direct
chemical contact
To protect nose and mouth from
inhaling pungent and volatile
chemical substances and dust
Protect the hand from
hazardous chemical
substances
Wash off any spilled chemicals
or toxic substances from body
and clothes
To handle microbiological
samples from
contaminated
Protect hand from hazardous
chemical substance
To protect the feet from
chemicals spil and glass
spinters
Carry experiment that used
sustances which are flammabe,
volatile, poisonous, corrosives
Protect clothing from
damage

11. DISPOSAL OF WASTE
SINK NOT INTO THE SINK

12. WHY?

13. Chemical with pH 5 to 9
Solutions with low
concentration & harmless
e.g. distilled water
Solid wastes ( glass)
Chemicals with pH less
than 5 or more than 9 Chemical solution (acids)
Toxic substances
Heavy metals e.g.
mercury
Organic wastes
e.g. carcasses
Radioactive wastes
Volatile substances
Reactive substances

14. Chemical with pH 5 to 9
Solutions with low
concentration & harmless
e.g. distilled water
Solid wastes ( glass)
Chemicals with pH less
than 5 or more than 9
Chemical solution (acids)
Toxic substances
Heavy metals e.g.
mercury
Organic wastes
e.g. carcasses
Radioactive wastes
Volatile substances
Reactive substances

15. How about the items
that we can’t dispose
into the sink?
How we actually
dispose them?

16. As easy as
ABCD….

17. Solid wastes ( glass) Chemicals with pH less
than 5 or more than 9
Chemical solution (acids)
Toxic substances
Heavy metals e.g.
mercury
Organic wastes
e.g. carcasses
Radioactive wastes
Volatile substances
Reactive substances

18. A
Disposed into ‘sharp’ bin. No sterilization
needed.
B
Packed into ‘biohazard’ bag, autoclaved and
then disposed into biohazard bin.
C
Wrapped in tissue, packed in ‘biohazard’ bag
and frozen.
D
Autoclaved and disposed.

19. Accidents in
laboratory
Chemical
spill
Mercury
spill
Inform
teacher/lab
assistant
Prohibited
area
Sand on the
spill
Gather the
spillage and
dispose safely
Sulphur on
mercury spill
Call fire
brigade

20. Chapter 1 Safety Measures in Lab
1.3 Fire Extinguisher
ITeach – Science Form 4

21. You are able to:
Describe the types of fire extinguisher and its
corresponding use on class of fire
Explain the method of using fire extinguisher -
PASS
Carry out an audit on the fire extinguishers at
school
Create a simple fire extinguisher that works by
using materials available at home

22. • Types of fire
• Symbol
• Manufacturer details
• How to use
• Expiry date

24. Classes of Fire
A Solid substances
Eg. Paper, wood, plastic
B Flammable solutions
Eg. Diesel, petrol
C Flammable gases
E.g. propane, butane, methane
D Flammable metals
Eg. Magnesium, lithium
F/K Fire at kitchen
Eg. Wok, cooking oil
Electric Electrical appliances
Eg. Computer, socket

27. • Spreading fire & heavy
smoke
• Release of toxic gases
• Extreme heat
• Fire exit blocked –fire or
smoke

28. • Made of fire-resistant
substances such as
woven glass fibre
fabric and and
fire retardant film
• Block the supply of
oxygen
• Not suitable for fire
caused by electric

30. • Not suitable for fire
caused by electric and
flammable chemicals

31. • Not suitable for fire
caused by oil

33. AUDIT FORM
• EXPIRY DATE
• TYPES OF FIRE EXTINGUISHER
• ANY DAMAGES
• LOCATION AS SHOWN IN FIRE EXIT PLAN

36. Title
• Text