1. Definition of Science Laboratory.

2. General Rules & Safety Precautions.

3. Common Lab Apparatus. 4. Using a Bunsen Burner. 5. Hazard symbols.

1.2 ： SCIENCE LABORATORY

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A room or a building in which scientific

investigations are carried out. It is the

place where we study science.

SCIENCE LABORATORY??

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Accidents happen everywhere including

Science Lab. So how do we prevent accidents

from happening?

SCIENCE LABORATORY??

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1. To avoid accidents to occur from mishandling certain materials & apparatus.

2. To obtain the correct results of the experiments.

Why are Rules and Safety Precautions made?

SCIENCE LABORATORY??

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Please print the document “General Rules and Safety

Precautions” and paste into your

Exercise Book COVER PAGE.

Examples of Rules and Safety Precautions ?

SCIENCE LABORATORY??

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Do you know all these apparatus??

COMMON LAB APPARATUS

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Do you know all these apparatus??

COMMON LAB APPARATUS

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Bunsen Burner is

used to heat

substances

USING A BUNSEN BURNER Outer cone Inner cone

B a r r e l

C o l l a r

Gas jet

Air hole

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1. Light up a match / lighter

before you turn on the gas on the

Bunsen burner.

USING A BUNSEN BURNER

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2. Use a test tube holder

during heating.

Don’t point the test tube

towards anyone

USING A BUNSEN BURNER

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3. Use a tripod

stand & wire gauze

when heating chemicals in

a beaker / crucible

USING A BUNSEN BURNER

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4. Use water bath when

heating flammable

substances.

USING A BUNSEN BURNER

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1. Close the air hole by turning the collar.

2. Bring a lighted match to the top of the barrel.

3. Turn on the gas slowly. 4. Adjust the collar until a steady

blue flame is obtained. 5. To obtain smaller flame, close the

air-hole a little or reduce the gas flow and vice versa.

USING A BUNSEN BURNER

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USING A BUNSEN BURNER Bunsen  burner  produces  2  types  of  flame  :-­‐  

Luminous Flame Non-Luminous Flame

Yellow colour

Air-hole is closed A lot of soot

Incomplete burning

Blue colour

Air-hole is opened Less soot

Much more HOTTER !!

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Some  chemicals  in  the  lab  are  harmful  to  our  body.  Thus,  hazard  symbols  are  used  to  show  nature  of  the  substances.  These  symbols  can  be  found  on  the  labels  of  the  chemical  

boCles  /  containers.  

HAZARD SYMBOLS

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