Masterclass Form 4 Science Chapter 1 Safety Measure in Lab

Science laboratory is a room prepared specially to ____________________

• store harmful substances

• use personal protective equipment

• learning science concepts

• carry out experiment

What is the name of this personal protective equipment?

• Goggles

• Lab visor

• Safety Helmet

• Self-protection helmet

Which of the following science activities requires the use of gloves?

• Pouring distilled water into a measuring cylinder

• Using a safety shower

• Using an eyewash station

• Catching earthworms

Why is the burning of iodine crystals carried out in a fume chamber?

• so that the iodine vapour is not contaminated by air

• so that the iodine crystals do not vapourise easily

• so that the iodine vapour does not contaminate the air

• so that the iodine crystals are not contaminated by dangerous microbes

What is avoided by objects kept in a laminar flow cabinet?

• Harmful pathogens

• Water vapour in the air

• Wind

• Air pollutants

What is this activity?

• Rinsing and cleaning the eye splashed with chemicals

• Rinsing and cleaning eye that has fine sand in it

• Relieving eye from pain

• Moistening the eye

What is the pH value of substance that can be disposed into the sink?

• only 7

• Less than 5

• More than 9

• Between 5 and 9

River near agricultural areas usually contain radioactive wastes. What are these wastes?

• Insecticides

• Phosphate fertilizers

• Livestock excretions

• Fish excretions

What type of waste is disposed of in this bin?

• Non-biohazardous waste

• Biohazardous waste

• Yellow coloured biological waste

• Biological waste from bacteria culture only

What type of substance if spilled in the laboratory requires assistance from the Fire and Rescue Department for further action?

• Mercury

• Petrol

• Grease

• Cooking oil