3.3 work safety
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Transcript of 3.3 work safety
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WORK SAFETYWORK SAFETY
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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.
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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.
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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
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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
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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
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McGraw-Hill © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved
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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.
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USE :USE :
FOR CONTAINING FOR CONTAINING OR HEATING OR HEATING SMALL AMOUNT SMALL AMOUNT OF SUBSTANCESOF SUBSTANCES
TEST TUBETEST TUBE
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USE :USE :
FOR CONTAINING FOR CONTAINING CHEMICALS OR CHEMICALS OR COLLECTING COLLECTING LIQUIDSLIQUIDS
BEAKERBEAKER
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USE :USE :
FOR CONTAINING FOR CONTAINING CHEMICALS OR CHEMICALS OR COLLECTING COLLECTING LIQIUDSLIQIUDS
CONICAL FLASKCONICAL FLASK(ELEMEYER)(ELEMEYER)
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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
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USE :USE :
FOR SCIENTIFIC TEST ESPECIALLY FOR SCIENTIFIC TEST ESPECIALLY FOR THE GROWING OF BACTERIA FOR THE GROWING OF BACTERIA
PETRI DISHPETRI DISH
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• USE /PURPOSE:TO PULL OUT OR TO PICK UP SMALL OBJECTS
TWEEZERTWEEZER
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SPATULASPATULA
USE :USE :
FOR MIXING LIQUIDS OR FOR FOR MIXING LIQUIDS OR FOR LIFTING CHEMICAL POWDERLIFTING CHEMICAL POWDER
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CAN YOU MENTION CAN YOU MENTION THE OTHER THE OTHER
APPARATUS LAB??APPARATUS LAB??
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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
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