Secondary Ones Secondary One Safety Briefing How could this accident have been prevented Throughout the lesson Be serious at all times in the Science laboratory Do not play or tamper with the equipment ID: 537611
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Safety Briefing
Secondary OnesSlide2
Secondary One – Safety Briefing
How could this accident have been prevented?Slide3
Throughout the lesson
Be serious at all times in the Science laboratory. Do not play or tamper with the equipment.
Keep your desk clean and tidy.
Before you begin the experiment
Prepare all apparatus and arrange them such that you will not knock them over while doing the experiment.
Laboratory rules
Secondary One – Safety BriefingSlide4
During the experiment
Never smell or taste chemicals unless your teacher grants permission.
Wear goggles when heating or mixing reactive chemicals.
Never handle broken glass apparatus with your bare hands. Inform your teacher and use a broom and dustpan to remove the broken glass.
Secondary One – Safety BriefingSlide5
After the experiment
Dispose of waste materials in proper waste bins.
Never throw solids or corrosive liquids in the sink.
Wash your hands thoroughly when the experiment is completed.
Failure to observe any of these safety precautions can lead to accidents such as a fire.
Secondary One – Safety BriefingSlide6
What should you do if a chemical spillage occurs?
If any chemicals spilled onto other parts of your body or clothing, wash it with plenty of water.
Report the spill to your teacher.
If any chemical accidentally gets in your mouth, spit it out into a basin immediately. Rinse your mouth with plenty of water and report it to your teacher.
Report all accidents, breakage and spillage to your teacher immediately.
Secondary One – Safety BriefingSlide7
Hazard symbols are used to label harmful chemicals.
Here are some common hazard symbols to look out for:
Explosive
Substance will react violently when heated or struck.
E.g. flash powder
Corrosive
Substance will eat away other substances.
E.g. sulfuric acid, potassium hydroxide, calcium oxide
Hazard symbols
Secondary One – Safety BriefingSlide8
Radioactive
Substance emits radiation.
E.g. radioactive carbon, uranium
Flammable
Substance catches fire easily.
E.g. petrol, kerosene, alcohol, hydrogen
Biohazardous
Poisonous substance of a biological nature.
E.g. medical waste such as blood and urine samples, micro-organism, virus or toxin
Secondary One – Safety BriefingSlide9
Irritant
Substance produces vapours or fumes which irritate the eyes, nose and throat.
E.g. phenol, chloroform
Toxic
Substance is harmful in small doses.
E.g. methanol, cyanide, mercury, carbon monoxide, chlorine
Secondary One – Safety BriefingSlide10
Secondary One – Safety Briefing
Now to do Worksheet 1.3 in your Theory Workbook.