science laboratory notes science tingkatan 1 power point bab 1 general rules

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

A room or a building in

which scientific

investigations are

carried out. It is the

place where we study

science.

Science laboratory??

Accidents happen

everywhere including

Science Lab. So how do

we prevent accidents

from happening?

Science laboratory??

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??

Please print the document

“General Rules and Safety

Precautions” and paste into

your Note Book.

Examples of Rules and Safety

Precautions ?

Science laboratory??

Do you know all these apparatus??

Common lab apparatus

Do you know all these apparatus??

Common lab apparatus

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

1. Light up a

match /

lighter

before you

turn on the

gas on the

Bunsen

burner.

Using a bunsen burner

2. Use a test

tube holder

during

heating.

Don’t point

the test tube

towards

anyone

Using a bunsen burner

3. Use a

tripod

stand &

wire gauze

when heating

chemicals in

a beaker /

crucible

Using a bunsen burner

4. Use a

water bath

when

heating

flammable

substances.

Using a bunsen burner

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

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 !!

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 bottles / containers.

Hazard symbols