Ch.1.3 Flashcards
We conduct __________________ in the laboratory. A laboratory has different types of ______________ and _______________.
Experiments, equipment, apparatus.
Name all the nine safety equipments used in laboratories.
Laboratory coat, safety goggles/ spectacles, gloves, sand bucket, fire blanket, fire extinguisher, fume cupboard, first-aid kit, eye-wash bottle.
For bigger fires, which tool do we use to put out fires?
Fire extinguisher.
For smaller fires or fires started by liquids or electrical appliances, which tool do we use to put out fires?
Sand bucket.
What is the use of a fume cupboard?
It is used to contain gas that leaks, or the spread of bacteria.
There are many ________________ in the laboratory. Accidents can happen if we do not pay attention to __________________.
Potential dangers, safety rules.
Name eight do rules in the lab.
Listen to the teacher’s instructions, know the fire escape route, read safety precautions before an experiment, wear safety goggles when heating or mixing substances, tie up long hair and tuck in school ties during experiments, wash hands after completing an experiment, keep the lab clean and tidy, report all accidents to teachers at once.
Name seven don’t rules in the lab.
Don’t enter the lab without the teacher’s permission, don’t run or play in the lab, don’t eat or drink in the lab, don’t smell or tastes any chemicals unless the teacher asks you to do so, don’t touch hot apparatus, don’t throw solid waste into the sink, don’t point test tubes containing boiling liquids towards yourself or other students.
A laboratory is a ________________ place for doing experiments.
Suitable.
We need to follow __________________ in the laboratory.
Safety rules.
__________________________ warn us of the potential dangers of the chemicals.
Hazard warning symbols.
If you see a flammable warning symbol on a chemical, what should you do?
Keep it away from heat or flame.
If you see a corrosive warning label on a chemical, what should you do?
Store in a well ventilated room, wear protective gloves and safety goggles while handling chemical.
If you see a explosive warning label on a chemical, what should you do?
Keep away from heat and flame, and avoid shock, which may cause chemical to explode.
If you see a toxic, irritant or harmful warning label on a chemical, what should you do?
Avoid breathing in the vapour of the chemical, wear protective gloves and safety goggles when handling chemical, wash your hands thoroughly after handling chemical.
What should we pay attention to before experiments?
The hazard warning symbols on the containers of chemicals.
Action to be taken when there is a cut:
Clean the wound with water an apply a dressing to it.
Action to be taken when there are heat burns/ chemical burns:
Place the affected area under slow running water.
Action to be taken when you have chemicals in your eyes:
Wash the eyes with distilled water from the eye-wash bottle.
Action to be taken when there is a glass breakage:
Clean up broken pieces of glass and dispose of them in a broken glass container; do not throw them into a general rubbish bin
Action to be taken when there is a gas leakage:
Turn off the gas supply and open all the windows and doors.
Action to be taken when there is a fire:
Keep calm and report to your teacher at once, do not put out the fire by yourself.
Conditions for a fire to start: (hint: there are three)
Fuel, high temperature and oxygen.
The three conditions fo a fire to start make up the ______________.
Fire triangle.
