WORK SAFETYWORK SAFETY

WORK SAFETYWORK SAFETY

Many investigations are conducted in the science Many investigations are conducted in the science laboratory. Some of them may be dangerous. Hence, laboratory. Some of them may be dangerous. Hence, laboratory rules must be observed to ensure the safety of laboratory rules must be observed to ensure the safety of everyone. Take some time to familiarize yourself with everyone. Take some time to familiarize yourself with these universal science laboratory rules. More importantly, these universal science laboratory rules. More importantly, you should observe these rules at all times while working you should observe these rules at all times while working in the laboratory.in the laboratory.

General rulesGeneral rules

1. Do not enter the science laboratory without th teacher,s permission.1. Do not enter the science laboratory without th teacher,s permission.2. Do not eat or drink in the science laboratory.2. Do not eat or drink in the science laboratory.3. Do not run around in the science laboratory.3. Do not run around in the science laboratory.4. Do not carry out any experiment without the teacher’s permission.4. Do not carry out any experiment without the teacher’s permission.5. Read the instructions carefully before you start the experiment. If in 5. Read the instructions carefully before you start the experiment. If in doubt, ask your teacher before you proceed. doubt, ask your teacher before you proceed.6. Do not smell the gases unless instructed by the teacher. Do not 6. Do not smell the gases unless instructed by the teacher. Do not breathe in any gas deeply. breathe in any gas deeply.7. Use apparatus and equipment correctly and carefully.7. Use apparatus and equipment correctly and carefully.8. Wash all the apparatus after use and dispose of waste 8. Wash all the apparatus after use and dispose of waste appropriately. Never throw solid waste material into the sink. Return appropriately. Never throw solid waste material into the sink. Return apparatus that has been cleaned to its original place. apparatus that has been cleaned to its original place.9. Do not remove chemicals and apparatus from the science 9. Do not remove chemicals and apparatus from the science laboratory. laboratory.10. Wash your hands thoroughly at the end of the practical lesson.10. Wash your hands thoroughly at the end of the practical lesson.11. Report all accident, spillages and breakages to your teacher 11. Report all accident, spillages and breakages to your teacher immediately. immediately.

Apparatus and EquipmentApparatus and Equipment

ApparatusApparatus FunctionFunction

Bunsen burnerBunsen burner

To raise a flame high enough To raise a flame high enough for heatingfor heating

Tripod standTripod stand

For supporting apparatus For supporting apparatus during heatingduring heating

ErlenmeyerErlenmeyer For containing chemicalsFor containing chemicals

Test tube Test tube For containing small amounts For containing small amounts of chemicalof chemical

SymbolSymbol Type of hazardous Type of hazardous substancesubstance

Proper HandlingProper Handling Examples of Examples of chemicalschemicals

Flammable substanceFlammable substance Keep away from Keep away from fire heatfire heat

Petrol, kerosene, Petrol, kerosene, alcoholalcohol

Explosive substaneExplosive substane Follow correct Follow correct procedureprocedure

Mixture of Mixture of hydrogen and hydrogen and oxygenoxygen

Corrosive substanceCorrosive substance Avoid direct Avoid direct contactcontact

Strong acid and Strong acid and alkalialkali

Poisonous or toxic Poisonous or toxic substancesubstance

Don’t drink, eat, Don’t drink, eat, taste the taste the substancesubstance

Mercury, cyanide, Mercury, cyanide, chlorine gaschlorine gas

Irritating or stimulate Irritating or stimulate substancesubstance

Avoid inhaling the Avoid inhaling the vapourvapour

Alcohol, Alcohol, chloroformchloroform

Radioactive substanceRadioactive substance Strictly adhere to Strictly adhere to all safety all safety preauctionspreauctions

Radioactive Radioactive carbon, uraniumcarbon, uranium

Hazard SymbolsHazard Symbols

ApparatusApparatus FunctionFunction

Beaker glassBeaker glassFor containing chemicalsFor containing chemicals

Measure glassMeasure glassFor measuring the volume of For measuring the volume of liquidsliquids

RackRackTo keep test tubeTo keep test tube

Dropping Dropping

pipettepipetteFor taking small amounts For taking small amounts (drops) of liquid(drops) of liquid

Surgical toolsSurgical toolsFor perform surgeriesFor perform surgeries

filtration funnelfiltration funnelFor filtrating liquidsFor filtrating liquids

McGraw-Hill © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved

SCIENTISTS USE DIFFERENT TYPES SCIENTISTS USE DIFFERENT TYPES OF APPARATUS TO CARRY OUT OF APPARATUS TO CARRY OUT EXPERIMENTS IN LABORATORIESEXPERIMENTS IN LABORATORIES

THE APPARATUS ENABLE THE THE APPARATUS ENABLE THE SCIENTISTS TO MAKE ACCURATE SCIENTISTS TO MAKE ACCURATE MEASUREMENTS AND MEASUREMENTS AND OBSERVATIONS TOO.OBSERVATIONS TOO.

USE :USE :

FOR CONTAINING FOR CONTAINING OR HEATING OR HEATING SMALL AMOUNT SMALL AMOUNT OF SUBSTANCESOF SUBSTANCES

TEST TUBETEST TUBE

USE :USE :

FOR CONTAINING FOR CONTAINING CHEMICALS OR CHEMICALS OR COLLECTING COLLECTING LIQUIDSLIQUIDS

BEAKERBEAKER

USE :USE :

FOR CONTAINING FOR CONTAINING CHEMICALS OR CHEMICALS OR COLLECTING COLLECTING LIQIUDSLIQIUDS

CONICAL FLASKCONICAL FLASK(ELEMEYER)(ELEMEYER)

USE :USE :

FOR MEASURING FOR MEASURING VOLUME OF LIQUID VOLUME OF LIQUID TO AN ACCURACY TO AN ACCURACY OF 1 CMOF 1 CM33

MEASURING CYLINDERMEASURING CYLINDER

USE :USE :

FOR SCIENTIFIC TEST ESPECIALLY FOR SCIENTIFIC TEST ESPECIALLY FOR THE GROWING OF BACTERIA FOR THE GROWING OF BACTERIA

PETRI DISHPETRI DISH

• USE /PURPOSE:TO PULL OUT OR TO PICK UP SMALL OBJECTS

TWEEZERTWEEZER

SPATULASPATULA

USE :USE :

FOR MIXING LIQUIDS OR FOR FOR MIXING LIQUIDS OR FOR LIFTING CHEMICAL POWDERLIFTING CHEMICAL POWDER

CAN YOU MENTION CAN YOU MENTION THE OTHER THE OTHER

APPARATUS LAB??APPARATUS LAB??

McGraw-Hill © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved

Home workHome workfind the other apparatus that you can find in find the other apparatus that you can find in

the labthe lab