Page 12 - Focus SPM KSSM 2021 Science (BI Version)

Form 4 (ii) • Laminar flow cabinet Checkpoint 2.2
is used to prevent
contamination during Q1 Heimlich Manoeuvre is an emergency
Chapter Safety Measures in the activities involving procedure that is carried out to save
1 Laboratory microbiology. an individual who is choking, due to
• Fume chamber is used something (for example food) being
to carry out experiments stuck in the trachea.
Checkpoint 1.1 that involve chemicals that Q2 An individual needs Heimlich
Q1 The school laboratory has various are volatile, flammable, Manoeuvre if found:
chemicals that are dangerous and poisonous, corrosive and (a) holding his neck with both hands Form
smelly.
suddenly
glassware that are fragile. (b) Eyewash station. He needs to (b) unable to talk or cough
Q2 goggles, face mask, gloves, lab coat, wear goggles so that chemical (c) skin, lips and nails suddenly 4
long pant and closed shoes. spills will not get into his eyes. bluish or darkens
3. (a) (i) Cannot (d) difficulty breathing
Checkpoint 1.2
(ii) Hydrochloric acid is a strong Q3 Food that enters the breathing
Q1 Acid, grease, oils acid and can corrode the passage will prevent oxygen from
Q2 Obey laboratory rules, carry out piping system in the sink. entering the lungs and hence cannot
activities and experiments carefully Hydrochloric acid will also be sent to the brain. Heimlich
and mindfully. pollute the river if disposed of Manoeuvre is important to ensure
Q3 Sharp tools, non-sharp solids, into the sink. victim that is choked does not
carcasses and body fluids (b) Liquid biological waste need to undergo brain damage or death.
Q4 To remove any biological agents that be decontaminated by autoclave. Q4 Can. Heimlich Manoeuvre can
Then, the liquid waste can be
are dangerous on sample such as disposed of directly into the be self-administered by applying
bacteria or fungus before disposing it sewage system through the pressure by bending the body over a
into the environment. laboratory sink. chair or a table and pushing the body
Q5 Inform the teacher or laboratory (c) His experimental waste is a against the chair or table.
assistant. frog carcass. Carcass need to
be wrapped with an absorbent 2
Checkpoint 1.3 material, in a biohazard plastic SPM Practice
Q1 Fuel, oxygen and heat bag and frozen. The bag must Objective Questions
be kept in a safe place at 1. D 2. B 3. C 4. B 5. A
Q2 Water, foam, carbon dioxide and dry freezing temperature such as a 6. D 7. B 8. A 9. C 10. C
powder cold room until it is disposed by
Q3 • Not harmful to human and animals a chosen contractor. Subjective Questions
• Do not pollute the soil
Chapter 1. (a) Perform chest compression
SPM Practice 1 2 Emergency Help (b) • Victim did not respond or react
Objective Questions • Victim has no pulse beat
1. B 2. D 3. A 4. D 5. D Checkpoint 2.1 (c) Do not agree. An individual
needs to learn proper CPR
6. B 7. C 8. C 9. A 10. D Q1 CPR is an emergency help that is methods from a reliable source
11. B or from a trained individual. This
carried out to restore heartbeat and is because CPR methods need
Subjective Questions breathing of victims facing heart and to be done to save the victim’s
1. (a) (i) Did not use personal breathing problems. life without suffering other
protective equipment Q2 Situations that requires CPR: injuries.
(ii) Gloves and lab coats (a) not breathing
(b) Thrown into the lab sink. Acetic (b) no pulse beat 2. (a) Heimlich Manoeuvre method
acid is a weak acid that does not (c) do not respond to stimulus (b) Choking victim
corrode the piping system. Q3 CPR is important to ensure the flow (c) Victim will lack oxygen causing
(c) Fold the face mask into half of blood throughout whole body of brain damage and death.
and roll it up. Throw it into the the victim. CPR is also important to (d) Chair or table
dustbin. Clean hands using hand (e) Bring victim to hospital for further
sanitiser. ensure continuous supply of oxygen treatment.
2. (a) (i) Laminar flow cabinet and to the victim’s brain to avoid brain
damage.
fume chamber.

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